git

reference:
git reference
* 🌳🚀 CS Visualized: Useful Git Commands
git cheatsheet
git commands
schacon/plumbing.md
git-tips/tips
521xueweihan/git-tips
CS Visualized: Useful Git Commands
10.8 Git Internals - Environment Variables
GitHub Flow Like a Pro with these 13 Git Aliases
gitglossary(7) Manual Page

appoint

git alias

br      = branch
co      = checkout
coa     = commit --amend --no-edit
pl      = !git --no-pager log --color --graph --pretty=tformat:'%C(red)%h%C(reset) -%C(yellow)%d%C(reset) %s %C(green)(%cr) %C(blue)<%an>%C(reset)' --abbrev-commit --date=relative --max-count=3
pls     = log --color --graph --pretty=tformat:'%C(red)%h%C(reset) -%C(yellow)%d%C(reset) %s %C(green)(%cr)%C(reset) %C(blue)<%an>%C(reset)' --abbrev-commit --date=relative
fpl     = log --color --graph --pretty=tformat:'%C(red)%H%C(reset) -%C(yellow)%d%C(reset) %s %C(green)(%cr)%C(reset) %C(blue)<%an>%C(reset)' --abbrev-commit --date=relative
fl      = log -p --graph --color --graph
rlog    = "!bash -c 'while read branch; do \n\
             git fetch --all --force; \n\
             git pl remotes/origin/$branch; \n\
           done < <(git rev-parse --abbrev-ref HEAD) '"

specifying ranges

references:
gitrevisions
First master absolute commit referencing...

git refloggit reflog resetusing tilde (~) and caret (^) combined

commit exclusions
- ^<rev> (caret) notation : To exclude commits reachable from a commit, a prefix ^ notation is used. E.g. ^r1 r2 means commits reachable from r2 but exclude the ones reachable from r1 (i.e. r1 and its ancestors)
dotted range notations
- .. (two-dot) range notation
  - r1..r2 : commits that are reachable from r2 excluding those that are reachable from r1 by ^r1 r2
- ... (three-dot) symmetric difference notation
  - r1...r2 : called symmetric difference of r1 and r2 It is the set of commits that are reachable from either one of r1 (left side) or r2 (right side) but not from both

commit

get revision number

[!TIP|label:the <value> can be:]
commit id
branch name
HEAD, HEAD~n, HEAD^^

$ git rev-parse <value>^{commit}

# i.e.:
$ git rev-parse HEAD
e06b245740ac0c73f9454b6d96758e3a4a804901

get abbrev commit ids

[!NOTE|label:references:]
--abbrev-commit
format:
%H : commit hash
%h : abbreviated commit hash

rev-list

$ git rev-list HEAD -n 3 --abbrev=11 --abbrev-commit
446c656814d
e747154df34
22d0ee9b131

# or via `git log`
$ git log -n 3 --format='%h' --abbrev=11
# or
$ git log -3 --format='%h' --abbrev=11
446c656814
e747154df3
22d0ee9b13

rev-parse

$ git rev-parse --short HEAD

# or
$ git rev-parse --short=7 HEAD

# i.e.:
$ git rev-parse --short HEAD
e06b24574
$ git rev-parse --short=7 HEAD
e06b245

get previous commit id

$ git rev-list --no-walk <commit-id>^

get next commit id

[!NOTE] references:
xueliu/version-up.sh

$ git rev-list --no-walk <commmit-id>..HEAD | tail -1

branch

get current branch

full branch name

$ git symbolic-ref HEAD
refs/heads/main

# [or](https://stackoverflow.com/a/62340432/2940319)
$ git rev-parse --symbolic-full-name HEAD
refs/heads/main

branch name

$ git branch --show-current
main

# or
$ git rev-parse --abbrev-ref HEAD
main

# or
$ git symbolic-ref --short HEAD
main

# or
$ git symbolic-ref --quiet --short HEAD || git rev-parse --short
main

# or
$ git symbolic-ref HEAD | sed -e "s/^refs\/heads\///"
main

# [or](https://stackoverflow.com/a/33485172/2940319)
$ git name-rev --name-only HEAD
main

for detached branch

$ git st
HEAD detached at d4beb6ac
...

$ git branch --no-color \
             --remote \
             --verbose \
             --no-abbrev \
             --contains |
      sed -rne 's:^[^/]*/([^\ ]+).*$:\1:p'
marslo/sandbox

# or
$ git branch --no-color \
             --remote \
             --verbose \
             --no-abbrev \
             --contains |
      sed -rne 's:^[ \s]*origin/([^\ ]+).*$:\1:p'

$ git name-rev --name-only HEAD |
      sed -rne 's:^[ \s]*([^\]+/){2}([^~]+).*$:\2:p'

# or
$ git name-rev --name-only HEAD |
      sed -rne 's:^[ \s]*remotes/origin/([^~]+).*$:\1:p'

create empty branch

create an empty branch

$ mkdir <MY_FOLDER> && cd $_
$ git init
$ git remote add origin <REMOTE_URL>
$ git fetch --all --progress --force
$ git checkout -b <BRANCH_NAME>

push to remote

$ git add --all .
$ git commit -m 'inital an empty branch'
$ git push --force -u origin HEAD:<BRANCH_NAME>

git alias .gitalias :

[alias]
init-repo   = "!f() { \
                      declare help=\"\"\"\
                        USAGE: git init-repo <REMOTE_URL> [DEFAULT_BRANCH] [LOCAL_DIR] \n\
                        OPT: \n\
                            REMOTE_URL: mandatory \n\
                            DEFAULT_BRANCH: optinal. default is 'master' \n\
                            LOCAL_DIR: optional. default is current directory: '\"$(pwd)\"' \n\
                      \"\"\"; \
                      declare remoteURL=\"$1\"; \
                      declare defaultBr='master'; \
                      declare localDir='.'; \
                      [ 2 -le $# ] && defaultBr=\"$2\"; \
                      [ 3 -eq $# ] && localDir=\"$3\"; \
                      if [ 0 -eq $# ] || [ 3 -lt $# ]; then \
                        echo \"${help}\"; \
                      else \
                        [ -d ${localDir} ] || mkdir -p ${localDir}; \
                        cd ${localDir} ; \
                        git init && \
                        git remote add origin ${remoteURL} && \
                        git fetch --all --force --quiet && \
                        git checkout -b ${defaultBr}; \
                      fi \
                    }; f \
              "

get branch name from reversion

branch -a --contians

$ git branch -a --contains a3879d3
* master
  remotes/origin/master

# or
$ git branch -r --contains a3879d3
origin/master

name-rev

$ git name-rev a3879d3
a3879d3 master~12

get upstream branch

get current

$ git rev-parse --abbrev-ref --symbolic-full-name @{u}
origin/marslo

# or
$ git for-each-ref --format='%(upstream)' $(git symbolic-ref -q HEAD)
refs/remotes/origin/marslo

# or for `meta/config`
$ git symbolic-ref -q HEAD
refs/heads/meta/config
$ git for-each-ref --format='%(upstream)' $(git symbolic-ref -q HEAD)
refs/remotes/origin/meta/config
$ git for-each-ref --format='%(upstream:short)' $(git symbolic-ref -q HEAD)
origin/meta/config

# [or](https://stackoverflow.com/a/49418399/2940319)
$ git status -bsuno
## master...origin/master

get specific

$ git rev-parse --abbrev-ref gh-pages@{upstream}
origin/gh-pages

# or
$ git for-each-ref --format='%(upstream:short)' $(git rev-parse --symbolic-full-name meta/config)
origin/meta/config

get local/remote branches

local

$ git for-each-ref --format='%(refname:short)' refs/heads/

remote

$ git for-each-ref --format='%(refname:short)' refs/remotes/origin/

sort local branch via `committerdate`

references:
How can I get a list of Git branches, ordered by most recent commit?
sort git branch by default
$ git config --global branch.sort -committerdate

$ git for-each-ref --sort=-committerdate refs/heads/

# or using git branch (since version 2.7.0)
$ git branch --sort=-committerdate  # DESC
$ git branch --sort=committerdate   # ASC

advanced usage

$ git for-each-ref \
      --sort=-committerdate \
      refs/heads/ \
      --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'

for remote

$ git for-each-ref --sort=-committerdate refs/remotes

gitalias

[alias]
  sb          = "! git branch --sort=-committerdate --format='%(HEAD) %(color:red)%(objectname:short)%(color:reset) - %(color:yellow)%(refname:short)%(color:reset) - %(subject) %(color:bold green)(%(committerdate:relative))%(color:reset) %(color:blue)<%(authorname)>%(color:reset)' --color=always"
  recent      = "! f() { \
                        declare help=\"USAGE: git recent [remotes|tags] [count]\"; \
                        declare refs; \
                        declare count; \
                        if [ 2 -lt $# ]; then \
                          echo \"${help}\"; \
                          exit 1; \
                        else \
                          if [ 'remotes' = \"$1\" ]; then \
                            refs='refs/remotes/origin'; \
                          elif [ 'tags' = \"$1\" ]; then \
                            refs='refs/tags'; \
                          elif [ 1 -eq $# ]; then \
                            count=$1; \
                          fi; \
                          if [ 2 -eq $# ]; then \
                            count=$2; \
                          fi; \
                        fi; \
                        git for-each-ref \
                            --sort=-committerdate \
                            ${refs:='refs/heads'} \
                            --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) %(color:green)(%(committerdate:relative))%(color:reset)' \
                            --color=always \
                            --count=${count:=5}; \
                    }; f \
                "

change head

[!NOTE|label:reference:]
warning: ignoring broken ref refs/remotes/origin/HEAD

check refs

$ git status
warning: ignoring broken ref refs/remotes/origin/HEAD

$ git symbolic-ref refs/remotes/origin/HEAD
refs/remotes/origin/new_master

fix warning

$ git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/new_master

# or
$ git remote set-head origin --delete
$ git remote set-head origin --auto

# or
$ git fetch --all --force
$ git remote set-head origin refs/remotes/origin/new_master

get first parent branch

[!NOTE|label:references:]
How to find the nearest parent of a Git branch
joechrysler/who_is_my_mummy.sh
* explainshell.com

tag

lightweight VS. annotated

show tags details

#                                          + - commit: lightweight tag
#                                          + - tag: annotated tag
#                                          |
#                                       +-----+
$ git for-each-ref refs/tags
902fa933e4a9d018574cbb7b5783a130338b47b8 commit refs/tags/v1.0-light
1f486472ccac3250c19235d843d196a3a7fbd78b tag    refs/tags/v1.1-annot
fd3cf147ac6b0bb9da13ae2fb2b73122b919a036 commit refs/tags/v1.2-light

show tag type via git cat-file -t

# lightweight
$ git cat-file -t v1.0-light
commit

# annotated
$ git cat-file -t v1.1-annot
tag

$ git show-ref -d --tags       |
  cut -b 42-                   | # to remove the commit-id
  sort                         |
  sed 's/\^{}//'               | # remove ^{} markings
  uniq -c                      | # count identical lines
  sed 's/2\ refs\/tags\// a /' | # 2 identicals = annotated
  sed 's/1\ refs\/tags\//lw /'

status

list ignored

[!NOTE|label:references:]
Git command to show which specific files are ignored by .gitignore
Is there a way to tell git-status to ignore the effects of .gitignore files?
git update-index
ignoring files
How can I stop .gitignore from appearing in the list of untracked files?

status

$ git status --ignored
On branch master
Your branch is up to date with 'origin/master'.

Ignored files:
  (use "git add -f <file>..." to include in what will be committed)
  bin/

nothing to commit, working tree clean

# short status
$ git status --ignored --short
!! bin/

$ git status --porcelain --ignored
!! bin/

$ git st --ignored --untracked-files=all
## master...origin/master
!! bin/cfssl
!! bin/cfssl-bundle
!! bin/cfssl-certinfo
!! bin/cfssl-newkey
!! bin/cfssl-scan
!! bin/cfssljson
!! bin/mkbundle
!! bin/multirootca

check-ignore

$ git check-ignore *
bin

$ git check-ignore -v *
.gitignore:4:bin  bin

$ git check-ignore -v $(find . -type f -print)
.gitignore:4:bin  ./bin/cfssl-scan
.gitignore:4:bin  ./bin/cfssl-certinfo
.gitignore:4:bin  ./bin/cfssl-bundle
.gitignore:4:bin  ./bin/cfssl
.gitignore:4:bin  ./bin/cfssl-newkey
.gitignore:4:bin  ./bin/multirootca
.gitignore:4:bin  ./bin/mkbundle
.gitignore:4:bin  ./bin/cfssljso

$ find . -not -path './.git/*' | git check-ignore --stdin
./bin
./bin/cfssl-scan
./bin/cfssl-certinfo
./bin/cfssl-bundle
./bin/cfssl
./bin/cfssl-newkey
./bin/multirootca
./bin/mkbundle
./bin/cfssljson

$ find . -path ./.git -prune -o -print | git check-ignore --no-index --stdin --verbose
.gitignore:4:bin  ./bin
.gitignore:4:bin  ./bin/cfssl-scan
.gitignore:4:bin  ./bin/cfssl-certinfo
.gitignore:4:bin  ./bin/cfssl-bundle
.gitignore:4:bin  ./bin/cfssl
.gitignore:4:bin  ./bin/cfssl-newkey
.gitignore:4:bin  ./bin/multirootca
.gitignore:4:bin  ./bin/mkbundle
.gitignore:4:bin  ./bin/cfssljson

ls-files

$ git ls-files --others --ignored --exclude-standard
# or
$ git ls-files -o -i --exclude-standard
bin/cfssl
bin/cfssl-bundle
bin/cfssl-certinfo
bin/cfssl-newkey
bin/cfssl-scan
bin/cfssljson
bin/mkbundle
bin/multirootca

# or list only directories
$ git ls-files --others --ignored --exclude-standard --directory
bin/

# or from `.gitignore` file
$ git ls-files --ignored --others --exclude-from=.gitignore
bin/cfssl
bin/cfssl-bundle
bin/cfssl-certinfo
bin/cfssl-newkey
bin/cfssl-scan
bin/cfssljson
bin/mkbundle
bin/multirootca

clean
```
$ git clean -ndX
Would remove bin/
```

log

short stat

$ git log --show-signature

# or
$ git log --shortstat

show renamed status

$ git log -M --summary | grep rename

# or
$ git log -M --summary | grep -E '^\s*rename.*{.*=>.*}'

show files and status without comments

$ git log --color --stat --abbrev-commit --date=relative --graph --submodule --format="%H"

# or
$ git log --color --stat --abbrev-commit --date=relative --graph --submodule --format="%h %ad- %s [%an]"

# or
$ git log --color --stat --abbrev-commit --date=relative --graph --submodule --format='%C(red)%h%Creset %C(yellow)(%ad)%Creset %s %C(blue)<%an>%Creset'

e.g.:

$ git log -3 --color --stat --abbrev-commit --date=relative --graph --submodule --format="%H"
* 50ede51fcc3cf0311fd85b3e9c4a36d4beb89e69
|
|  devops/git/gerrit.md | 6 ++++--
|  devops/git/git.md    | 5 +++++
|  2 files changed, 9 insertions(+), 2 deletions(-)
* 41d58dabcd0aaee33edd1de7793ffd82c7cffa89
|
|  SUMMARY.md | 2 +-
|  1 file changed, 1 insertion(+), 1 deletion(-)
* 4460a32d8fddbe7c5c434947aea153273ce215d4
|
|  devops/git/{gitStudy.md => git.md} | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
|  1 file changed, 116 insertions(+), 1 deletion(-)

show submodule changes

$ git submodule status
$ git log -- <submodule name>

get change from `.git/objects`

$ find .git/objects -type f -printf "%P\n" | sed s,/,,

get change history for deleted files

full-history

$ git log --all --full-history -- <path/to/file>

$ git log --all --full-history --oneline -- <path/to/file>

$ git log --oneline --follow -- <path/to/file>

$ git log --diff-filter=D --summary | find "delete" | grep <filename>

--follow
```
$ git log --follow <path/to/file>
```

search by contents

$ git log -S'add' --oneline  -3
6f7877c2 update git for fetch more refs after cloned via --single-branch, and add tricky for vim
30ce195e add jenkins plugin jira-steps
913a7f29 update jenkins recommended plugins

# -p, --paginate
#     Pipe all output into less (or if set, $PAGER) if standard output is a terminal. This overrides the
#     pager.<cmd> configuration options (see the "Configuration Mechanism" section below)
$ git pls -S'add' -p

search by message

$ git log --grep='jira' --oneline
30ce195e add jenkins plugin jira-steps
d17dd3aa add jira api

or
```
$ git pls --grep='jira'
```

rebase

[!TIP]
about GIT_SEQUENCE_EDITOR
git rebase in depth

automatic edit by `git rebase -i`

inspired from .gitconfig & Is there a way to squash a number of commits non-interactively?

$ COUNT=$1
$ GIT_EDITOR="sed -i -e '2,$COUNT s/^pick /s /;/# This is the 2nd commit message:/d'" git rebase -i HEAD~$COUNT

git alias

[alias]
  sq = ! "f() { TARGET=$1 && GIT_EDITOR=\"sed -i -e '2,$TARGET s/^pick /s /;/# This is the 2nd commit message:/,$ {d}'\" git rebase -i HEAD~$TARGET; }; f"

$ GIT_SEQUENCE_EDITOR="sed -i 's/^pick ce5efdb /edit ce5efdb /;/^pick ce6efdb /d'" git rebase -i ${SHA}

or edit

$ GIT_SEQUENCE_EDITOR="sed -i -re 's/^pick 134567/e 1234567/'" git rebase -i 1234567^

or sequence.editor

$ git -c sequence.editor='sed -i s/pick/reword/' rebase -i ${SHA}

auto rebaes

.gitconfig

[alias]
  arebase = ! ~/.marslo/bin/arebase.sh

~/.marslo/bin/arebase.sh

#!/bin/bash

ACTION=$1
COMMIT=$(git rev-parse --short $2)
[[ "$COMMIT" ]] || exit 1
CORRECT=
for A in p pick r reword e edit s squash f fixup d drop t split; do
   [[ $ACTION == $A ]] && CORRECT=1
done
[[ "$CORRECT" ]] || exit 1
git merge-base --is-ancestor $COMMIT HEAD || exit 1
if [[ $ACTION == "drop" || $ACTION == "d" ]]; then
  GIT_SEQUENCE_EDITOR="sed -i -e '/^pick $COMMIT/d'" git rebase -i $COMMIT^^
elif [[ $ACTION == "split" || $ACTION == "t" ]]; then
  GIT_SEQUENCE_EDITOR="sed -i -e 's/^pick $COMMIT/edit $COMMIT/'" git rebase -i $COMMIT^^ || exit 1
  git reset --soft HEAD^
  echo "Hints:"
  echo "  Select files to be commited using 'git reset', 'git add' or 'git add -p'"
  echo "  Commit using 'git commit -c $COMMIT'"
  echo "  Finish with 'git rebase --continue'"
else
  GIT_SEQUENCE_EDITOR="sed -i -e 's/^pick $COMMIT/$1 $COMMIT/'" git rebase -i $COMMIT^^
fi

fix typo in commits

$ EDITOR="sed -i -e 's/borken/broken/g'" GIT_SEQUENCE_EDITOR="sed -i -e 's/pick/reword/g'" git rebase -i --root

or:

$ VISUAL="sed -i -e '/^[[:blank:]]*Change-Id/ d'" GIT_SEQUENCE_EDITOR="sed -i -e 's/pick/reword/g'" git rebase -i --root

or:

$ GIT_EDITOR="sed -i -e 's/kyewrod/keyword/g'" GIT_SEQUENCE_EDITOR="sed -i -e 's/pick/reword/g'" git rebase -i --root

undo

delete after push

delete only the latest commit

$ git push origin +<hash_for_delete>^:<branch>

# e.g.:
$ git pl --pretty=format:"%h" --no-patch
* cb46bdc
* 936543c
* a83ac6b

# delete cb46bdc
$ git push origin +cb46bdc^:master

delete multiple commits

revert local

$ git reset --hard HEAD~

# or
$ git reset --hard HEAD^^^

# or
$ git reset --hard <commit_hash>

# or
$ git rebase -i HEAD~<n>

push to remote

$ git push [--force] origin +<branch>
# e.g.:
$ git push [--force] origin +master

revert deleted branches

[!TIP] references:
Can I recover a branch after its deletion in Git?
How to Restore a Deleted Branch or Commit with Git Reflog
How to restore a deleted branch

# find the HEAD of deleted branch
$ git log --graph --decorate $(git rev-list -g --all)

$ git checkout <sha>
$ git checkout -b /branch/name

or find out recent actions
```
$ git reflog --no-abbrev
```

or find all losts

$ git fsck --full \
           --no-reflogs \
           --unreachable \
           --lost-found |
      grep commit |
      cut -d\  -f3 |
      xargs -n 1 git log -n 1 --pretty=oneline

show diff
```
$ git log -p <sha>
```

revert single file to remotes

$ git checkout origin/<branch> -- <path/to/file>

revert changes in submodule

$ git submodule update -f --init

$ git submodule foreach --recursive git reset --hard

or
```
$ git submodule update -f --recursive
```

$ git submodule foreach --recursive git reset --hard
$ git submodule update --recursive --init

Git Reset vs Revert vs Checkout reference

Command Scope Common use cases

Command	Scope	Common use cases
`git reset`	Commit-level	Discard commits in a private branch or throw away uncommited changes
`git reset`	File-level	Unstage a file
`git checkout`	Commit-level	Switch between branches or inspect old snapshots
`git checkout`	File-level	Discard changes in the working directory
`git revert`	Commit-level	Undo commits in a public branch
`git revert`	File-level	(N/A)

git reset

Commit-level

Discard commits in a private branch or throw away uncommited changes

git reset

File-level

Unstage a file

git checkout

Commit-level

Switch between branches or inspect old snapshots

git checkout

File-level

Discard changes in the working directory

git revert

Commit-level

Undo commits in a public branch

git revert

File-level

(N/A)

git reset via git reflog
git reset --hard
git reset --soft
git revert

change latest comments in local

$ git commit --amend

change comments in remote

$ git pl
* a79d384 - (HEAD -> master, origin/master, origin/HEAD) update (11 seconds ago) <marslo>
* 7cef7c7 - update (7 hours ago) <marslo>
* e1d7a64 - update (7 hours ago) <marslo>

# change comments on a79d384
$ git commit --amend
$ git push --force-with-lease origin master

# result
$ git fetch --all --force
$ git pl remotes/origin/master
Fetching origin
* ba49259 - (HEAD -> master, origin/master, origin/HEAD) update a79d384 for change comments (24 seconds ago) <marslo>
* 7cef7c7 - update (7 hours ago) <marslo>
* e1d7a64 - update (7 hours ago) <marslo>

change remote comments

$ git rebase -i HEAD~<n>

And then change pick to reword

example

$ git pls
* 1e7d979 - (HEAD -> master, origin/master, origin/HEAD) f (24 seconds ago) <marslo>
* 9b89ed7 - c (40 seconds ago) <marslo>
* beb575f - d (51 seconds ago) <marslo>
* 25d010d - e (57 seconds ago) <marslo>
* c502e34 - b (64 seconds ago) <marslo>
* 8890288 - init commit (4 minutes ago) <Marslo Jiao>

$ git rebase -i HEAD~5
reword c502e34 b
pick 25d010d e
pick beb575f d
reword 9b89ed7 c
pick 1e7d979 f

$ git push --force origin master
# or
$ git push origin +master

change root comments

$ git rebase -i --root
$ git push origin +<branch>

change author and committer

rebase and amend

go to interactive mode

$ git config --local user.name "name"
$ git config --local user.email "name@email.com"
$ git rebase -i <sha>

modify pick to edit

amend one by one

$ git commit --amend --no-edit --only --author="name<name@email.com>"
# or
$ git commit --amend --no-edit --date="$(git log -n 1 --format=%aD)" --reset-author

$ git rebase --continue

git replace

rebase --onto

[!TIP] see also

rebase onto

[alias]
    reauthor = !bash -c 'git rebase --onto $1 --exec \"git commit --amend --author=$2\" $1' --

$ git config --local user.name "name"
$ git config --local user.email "<name@email.com>"
$ git rebase --no-edit \
             --onto HEAD~9 \
             --exec 'GIT_COMMITTER_DATE="$(git log -n 1 --format=%aD)" \
                     git commit --amend \
                                --date="$(git log -n 1 --format=%aD)"' \
                                --author="name<name@email.com>" \           # or --reset-author
                     HEAD~9'

-x '-CHEAD'
[!TIP]
- How to amend several commits in Git to change author
  -CHEAD: change the author but maintain the original timestamps
```
$ git rebase -i BASE_SHA^ -x \
      "git commit --amend --author 'John Doe <johndoe@example.com>' -CHEAD"
```
amend all commits with original commitDate and authorDate
[!TIP|label:references:]
```
$ git -c rebase.instructionFormat='%s%nexec GIT_COMMITTER_DATE="%cD" GIT_AUTHOR_DATE="%aD" git commit --amend --no-edit --author 'marslo <marslo.jiao@gmail.com>' rebase
```

check commits with author

# get commits by name
$ git log --oneline --author="name"

# get commits by email
$ git log --oneline --author="<name@email.com>"

mv

case sensitive

error with regular git mv

$ git config --global core.ignorecase true
$ git mv Tig tig
fatal: renaming 'confs/home/Tig' failed: Invalid argument

renmae

$ git mv Tig temp
$ git aa
$ git mv temp tig
$ git aa
$ git st
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
    renamed:    Tig/.tig/marslo.tigrc -> tig/.tig/marslo.tigrc
    renamed:    Tig/.tigrc -> tig/.tigrc
    renamed:    Tig/.tigrc_latest -> tig/.tigrc_latest
    renamed:    Tig/tigrc_2.4.1_1_example -> tig/tigrc_2.4.1_1_example
    renamed:    Tig/tigrc_Marslo -> tig/tigrc_Marslo

clean

clean untracked directory and item in `.gitignore`

gitignore.io

$ git clean -dfx

quick generate .gitignore

# show result
$ curl -skL https://www.gitignore.io/api/groovy

# download
$ curl -skL https://www.toptal.com/developers/gitignore/api/groovy,java,python,go -o .gitignore

using `-f` twice if you really want to remove such a directory

$ git st
On branch meta/config
Your branch is based on 'origin/meta/config', but the upstream is gone.
  (use "git branch --unset-upstream" to fixup)

Untracked files:
  (use "git add <file>..." to include in what will be committed)
    my-sbumodule/

nothing added to commit but untracked files present (use "git add" to track)

$ git clean -dfx
Skipping repository my-submodule/

$ git clean -dffx
Removing my-submodule/

diff

`diff-highlight`

[!NOTE] references:
How to improve git's diff highlighting?
git and diff-highlight

# centos8
$ rpm -ql git | grep diff-highlight
/usr/share/git-core/contrib/diff-highlight
# or ubuntu
$ dpkg -L git | grep diff-highlight

$ sudo ln -sf /usr/share/git-core/contrib/diff-highlight /usr/local/bin/diff-highlight

get difference between two branches

$ git log --left-right --graph --cherry-pick --oneline origin/<release>..origin/<dev>

$ git rev-list --reverse \
               --pretty="TO_TEST %h (<%ae>) %s" \
               --cherry-pick \
               --right-only origin/<release>...origin/<dev> \
               | grep "^TO_TEST "

diff ignore whitespace

[!NOTE|label:references:]
Ignore all whitespace changes with git-diff between commits
Error in console fatal: cannot enforce both tab-in-indent and indent-with-non-tab
indentation configuration only for some files
How to show space and tabs with git-diff

ignore tab

[!TIP|label:tab-in-indent]
Git v1.7.2 Release Notes

$ git config core.whitespace '-tab-in-indent'
$ git diff HEAD^..

ignore tab-in-indent for *.config and *.ltsv only

$ cat ~/.gitattributes
       File: /Users/marslo/.gitattributes
   1   *.config    text diff=config whitespace=-tab-in-indent
   2   *.ltsv      text diff=ltsv whitespace=-tab-in-indent

ignore all

$ git config core.whitespace '-trailing-space,-indent-with-non-tab,-tab-in-indent'

tag

reference :
git like a pro: sort git tags by date
How do you achieve a numeric versioning scheme with Git?

discribe

$ git describe --tags --long <revision>

# v2.5-0-gdeadbee
# ^    ^ ^^
# |    | ||
# |    | |'-- SHA of HEAD (first seven chars)
# |    | '--- "g" is for git
# |    '----- distance : number of commits since last tag
# |
# '---------- last tag name

get distance between tags

$ git describe HEAD --tags

or
```
$ git describe HEAD --all --long
```

get revision in particular branch

$ git tag -l --sort='creatordate' --merged <branch>

get latest tag

references:
Get the most recent tag in git
GIT LIKE A PRO: SORT GIT TAGS BY DATE

$ git tag -l --sort='creatordate' --merged <branch> | tail -1

# the command can be executed in .git folder (! -is-inside-work-tree)
$ git describe --tags --abbrev=0 --always

$ git for-each-ref --sort=taggerdate \
                   --format '%(tag)' \
                   refs/tags |
      tail -1

to get verbose output

$ git for-each-ref --sort=taggerdate \
                   --format '%(tag) %(taggerdate:raw) %(taggername) %(subject)' \
                   refs/tags

$ git for-each-ref --sort=taggerdate \
                   --format '%(tag)_,,,_%(taggerdate:raw)_,,,_%(taggername)_,,,_%(subject)' \
                   refs/tags |
      awk 'BEGIN { FS = "_,,,_"  } ; { printf "%-20s %-18s %-25s %s\n", $2, $1, $4, $3  }'

$ git log --tags \
          --simplify-by-decoration \
          --pretty="format:%ai %d" |
      sort

or formatted date

$ git for-each-ref --sort=taggerdate \
                   --format '%(tag)_,,,_%(taggerdate:raw)_,,,_%(taggername)_,,,_%(subject)' \
                   refs/tags |
      awk 'BEGIN { FS = "_,,,_"  } ; { t=strftime("%Y-%m-%d  %H:%M",$2); printf "%-20s %-18s %-25s %s\n", t, $1, $4, $3  }'

or git alias

tags = !"git for-each-ref \
             --sort=taggerdate \
             --format '%(tag)_,,,_%(taggerdate:raw)_,,,_%(taggername)_,,,_%(subject)' refs/tags \
             | awk 'BEGIN { FS = \"_,,,_\"  } ; { t=strftime(\"%Y-%m-%d  %H:%M\",$2); printf \"%-20s %-18s %-25s %s\\n\", t, $1, $4, $3  }'"

get revision from latest tag in particular branch

$ git rev-list -1 --no-patch $(git tag -l --sort='creatordate' --merged <branch> | tail -1)

show all tags for particular revision

$ git tag --points-at <revision>

get tags for HEAD:
```
$ git tag --points-at HEAD
```

$ git name-rev --tags --name-only $(git rev-parse <revision>)

example

$ git name-rev --tags --name-only $(git rev-parse HEAD)

get tag and distance (depth)

reference:
Why does git-describe prefix the commit ID with the letter 'g'?

man of git-describe:

The hash suffix is "-g" + an unambigous abbreviation for the tip commit of parent.

The length of the abbreviation scales as the repository grows, using the approximate number of objects in the repository and a bit of math around the birthday paradox, and defaults to a minimum of 7.

$ git describe --long --tags
v1.0.0-epsilon-2-g46b7ebb
  |            |     + -g<has>
  |            + distance (commits on top)
  + tag name

# or
$ git describe --dirty --tags --long
v1.0.0-epsilon-2-g46b7ebb
|            | |  |
 \___    ___/  |  + commit hash of the current commit
      most     + commits on top
     recent
      tag

or --all

$ git describe --all --long

to filter the tags

$ git describe --dirty --tags --long --match *nightly*
nightly#82-2001310818-1765-gc18894b193

sort git tags by ascending and descending semver

[!TIP] prepend "-" to reverse sort order.
ascending : --sort=<type>
descending : --sort=-<type>
references:
How to sort git tags by version string order of form rc-X.Y.Z.W?
How can I list all tags in my Git repository by the date they were created?
GIT LIKE A PRO: SORT GIT TAGS BY DATE

via v:refname or version:refname

by created data

$ git for-each-ref --sort=creatordate --format='%(refname) %(creatordate)' refs/tags

# or
$ git tag --format='%(creatordate:short)%09%(refname:strip=2)' --sort=creatordate

# or
$ git for-each-ref --sort=taggerdate --format='%(tag) %(taggerdate) %(taggername) %(subject)' refs/tags

# much better
$ git for-each-ref --sort=taggerdate \
                   --format '%(tag)_,,,_%(taggerdate:raw)_,,,_%(taggername)_,,,_%(subject)' refs/tags |
      awk 'BEGIN { FS = "_,,,_"  } ; { t=strftime("%Y-%m-%d  %H:%M",$2); printf "%-20s %-18s %-25s %s\n", t, $1, $4, $3  }'

checkout

sparse-checkout

[!NOTE|label:references:]
Git submodule prepare for sparse checkout
$ git submodule absorbgitdirs
$ git -C <submodule> config core.sparseCheckout true
$ echo 'path/to/*' >>.git/modules/<submodule>/info/sparse-checkout
How to do submodule sparse-checkout with Git?
git sparse-checkout of a submodule from a root repo

checkout specific commit

# make a new blank repository in the current directory
git init

# add a remote
git remote add origin url://to/source/repository

# fetch a commit (or branch or tag) of interest
# Note: the full history up to this commit will be retrieved unless
#       you limit it with '--depth=...' or '--shallow-since=...'
git fetch origin <sha1-of-commit-of-interest>

# reset this repository's master branch to the commit of interest
git reset --hard FETCH_HEAD

checkout particular commit and submodules

[!TIP] references:
How to checkout old git commit including all submodules recursively?
nicktoumpelis/repo-rinse.sh

$ git checkout --recurse-submodules

# [optional] create new branch
$ git branch <branch-name> <commit-id>
$ git checkout <branch-name>

$ git checkout <commit-id>

$ git submodule init                 # optional
$ git submodule update --recursive

$ git clean -xfd
$ git submodule foreach --recursive git clean -xfd
$ git reset --hard
$ git submodule foreach --recursive git reset --hard
$ git submodule update --init --recursive

checkout single branch

$ git clone --single-branch --branch <branch name> url://to/source/repository [target dir]

# or
# https://stackoverflow.com/a/13928822/2940319
$ mkdir -p <repo> && cd <repo>
$ git init
$ git fetch origin refs/heads/<branch>:refs/remotes/origin/<branch>
$ git checkout $(git rev-parse origin/<branch>^{commit})

add more branches

$ git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
$ git fetch origin

$ cat ~/.marslo/.gitalias
[alias]
  # [a]dd [f]etch [r]efs
  afr = !bash -c 'git config --add remote.origin.fetch "+refs/heads/$1:refs/remotes/origin/$1"'

$ git afr 'sandbox/marslo/*'

remote

fetch single branch

[!NOTE|label:references:]
* 10.5 Git Internals - The Refspec
Why does "git clone" not take a refspec?
How do I "undo" a --single-branch clone?

with git remote

$ mkdir -p <repo> && cd <repo>
$ git init

# set remote url
$ git remote add -f origin <repoUrl>

# set refsepc
$ git remote set-branches origin <branch>

# update local repo
$ git config core.sparseCheckout true
$ git fetch --all --progress
$ git checkout <branch>

with git config

$ mkdir -p <repo> && cd <repo>
$ git init

# set remote url
$ git config remote.origin.url <repoUrl>

# set refsepc
$ git config [--add] remote.origin.fetch "+refs/heads/<branch>:refs/remotes/origin/<branch>"

# update local repo
$ git config core.sparseCheckout true
$ git fetch --all --progress
$ git checkout <branch>

clone with different refsepc

clone --config

$ git clone -c remote.origin.fetch=+refs/changes/*:refs/remotes/origin/changes/* <repoUrl>

# verify
$ git config --local --get-regexp origin.*
remote.origin.fetch +refs/changes/*:refs/remotes/origin/changes/*
remote.origin.url <repoUrl>
remote.origin.fetch +refs/heads/*:refs/remotes/origin/*

config --add

$ git config --local --get-regexp origin.*
remote.origin.url <repoUrl>
remote.origin.fetch +refs/heads/*:refs/remotes/origin/*

$ git config --add remote.origin.fetch "+refs/changes/*:refs/remotes/origin/changes/*"

$ git config --local --get-regexp origin.*
remote.origin.url <repoUrl>
remote.origin.fetch +refs/heads/*:refs/remotes/origin/*
remote.origin.fetch +refs/changes/*:refs/remotes/origin/changes/*

add more remotes

push to multiple remotes

#                       remote name
#                            v
$ git remote set-url --add origin <remoteUrl>

# before
$ git remote -v
origin  ssh://path/to/repoUrl (fetch)
origin  ssh://path/to/repoUrl (push)

# after
origin  ssh://path/to/repoUrl (fetch)
origin  ssh://path/to/repoUrl (push)
origin  ssh://path/to/remoteUrl (push)

fetch and push to different repos

$ git remote set-url --push origin ssh://path/to/remoteUrl

# before
$ git remote -v
origin  ssh://path/to/repoUrl (fetch)
origin  ssh://path/to/repoUrl (push)

# after
origin  ssh://path/to/repoUrl (fetch)
origin  ssh://path/to/remoteUrl (push)

remove remote repo

$ git remote set-url --delete --push origin ssh://path/to/remoteUrl

blame

blame in line range

-L <start>,<end>

$ git blame -L 1,3 README.md
a03bebd23 (marslo Nov 2 2020       1) ---
a03bebd23 (marslo Nov 2 2020       2) disqus: false
a03bebd23 (marslo Nov 2 2020       3) ---

$ git blame -L 1,+3 README.md
a03bebd23 (marslo Nov 2 2020       1) ---
a03bebd23 (marslo Nov 2 2020       2) disqus: false
a03bebd23 (marslo Nov 2 2020       3) ---

-L :<funcname>

$ git blame -L :pkgInstallation belloHAKubeCluster.sh
38327eac (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {
38327eac (marslo 2019-09-17 22:10:53 +0800 test2)   dockerInstallation
38327eac (marslo 2019-09-17 22:10:53 +0800 test3)   k8sInstallation
38327eac (marslo 2019-09-17 22:10:53 +0800 test4)   cfsslInstallation
38327eac (marslo 2019-09-17 22:10:53 +0800 test5)   etcdInstallation
bdfe4340 (marslo 2019-09-23 16:35:08 +0800 test6)   helmInstallation
38327eac (marslo 2019-09-17 22:10:53 +0800 test7) }
38327eac (marslo 2019-09-17 22:10:53 +0800 test8)

# or
$ git blame -L '/pkgInstallation/,+3' belloHAKubeCluster.sh
38327eac (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {
38327eac (marslo 2019-09-17 22:10:53 +0800 test2)   dockerInstallation
38327eac (marslo 2019-09-17 22:10:53 +0800 test3)   k8sInstallation

by keywords ( git log -S )

$ git pls -S pkgInstallation belloHAKubeCluster.sh
...
* 38327ea - update (2 years, 10 months ago) <marslo>

format

-s

$ git blame -s README.md | head -2
a03bebd23  1) ---
a03bebd23  2) disqus: false

-n, --show-number

$ git blame -n -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
38327eac 553 (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {

-f, --show-name

$ git blame -f -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
38327eac kubernetes/belloHAKubeCluster.sh (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {

-e, --show-email

[!TIP] This can also be controlled via the blame.showEmail config option.

$ git blame -e -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
38327eac (<marslo@gmail.com> 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {

-l

$ git blame -l -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
38327eac9b01d57c13d1865d58d822a81717d60f (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {

--date

[!TIP] check : imarslo: date format setup global in ~/.gitconfig :
[blame]
  date="format:%Y-%m-%d %H:%M:%S %p"

$ for i in iso iso-strict relative local rfc short raw human unix 'format:%c' '"format:%Y-%m-%d %H:%M:%S"'; do
    cmd="git blame --date=${i} -L '/pkgInstallation/,+1' belloHAKubeCluster.sh";
    echo ${cmd}; eval ${cmd}; echo "";
  done

  git blame --date=iso -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 2019-09-17 22:10:53 +0800 test1) function pkgInstallation() {

  git blame --date=iso-strict -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 2019-09-17T22:10:53+08:00 test1) function pkgInstallation() {

  git blame --date=relative -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 2 years, 10 months ago test1) function pkgInstallation() {

  git blame --date=local -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo Tue Sep 17 22:10:53 2019       test1) function pkgInstallation() {

  git blame --date=rfc -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo Tue, 17 Sep 2019 22:10:53 +0800 test1) function pkgInstallation() {

  git blame --date=short -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 2019-09-17 test1) function pkgInstallation() {

  git blame --date=raw -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 1568729453 +0800 test1) function pkgInstallation() {

  git blame --date=human -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo Sep 17 2019      test1) function pkgInstallation() {

  git blame --date=unix -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 1568729453 test1) function pkgInstallation() {

  git blame --date=format:%c -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo Tue Sep 17 22:10:53 2019 test1) function pkgInstallation() {

  git blame --date="format:%Y-%m-%d %H:%M:%S" -L '/pkgInstallation/,+1' belloHAKubeCluster.sh
  38327eac (marslo 2019-09-17 22:10:53 test1) function pkgInstallation() {

--color-lines
[!TIP] references:
- color.blame.repeatedLines
example:
```
[color "blame"]
  repeatedLines = 130
```

--color-by-age

[!TIP] references:

example:

[color "blame"]
  highlightRecent = 239, 20 month ago, 240, 18 month ago, 241, 16 month ago, 242, 14 month ago, 243, 12 month ago, 244, 10 month ago, 245, 8 month ago, 246, 6 month ago, 247, 4 month ago, 131, 3 month ago, 137, 2 month ago, 172, 1 month ago, 167, 3 weeks ago, 166, 2 weeks ago, 203, 1 week ago, 202
// others
[color "blame"]
  highlightRecent = 237, 20 month ago, 238, 19 month ago, 239, 18 month ago, 240, 17 month ago, 241, 16 month ago, 242, 15 month ago, 243, 14 month ago, 244, 13 month ago, 245, 12 month ago, 246, 11 month ago, 247, 10 month ago, 248, 9 month ago, 249, 8 month ago, 250, 7 month ago, 251, 6 month ago, 252, 5 month ago, 253, 4 month ago, 254, 3 month ago, 231, 2 month ago, 230, 1 month ago, 229, 3 weeks ago, 228, 2 weeks ago, 227, 1 week ago, 226

tricky

--since

$ git blame --since=3.weeks -- foo

# or
$ git blame v2.6.18.. -- foo

for-each-ref

[!NOTE|label:references:]
references:
git-for-each-ref - Output information on each ref | * examples
--sort:
authordate
committerdate
creatordate
taggerdate

get refs days ago

while read revision branch commitDate; do
  benchmark=$(date +%s --date="1 year ago")
  # echo "benchmark: $benchmark"
  if [[ commitDate -le benchmark ]]; then
    git for-each-ref ${branch} --format='%(refname:short) - %(align:right,20)%(committerdate:format:%Y-%m-%d %H:%M:%S)%(end)'
  fi
done < <(git for-each-ref refs/remotes/origin/sandbox --sort=committerdate --format='%(objectname) %(refname) %(committerdate:unix)')

to archive

$ git push origin refs/remotes/origin/sandbox/marslo/test:refs/remotes/archive/sandbox/marslo/test
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
remote: Processing changes: refs: 1, done
remote: GitMS - update replicated.
To ssh://gerrit.domain.com:29418/storage/ssdfw/devops/jenkins
 * [new reference]     origin/sandbox/marslo/test -> archive/sandbox/marslo/test

to delete

# delete local refs
$ git update-ref -d refs/remotes/origin/sandbox/marslo/test -m 'already archived in refs/remotes/archive/sandbox/marslo/test'
# delete remote refs
$ git push . :refs/remotes/origin/sandbox/marslo/test

# or delete without `refs/remotes/`
$ git push origin --delete archive/sandbox/marslo/test
$ git push origin --delete origin/sandbox/marslo/test

delete via origin will get issue internal server error

$ git push origin --force :refs/remotes/origin/sandbox/marslo/test
remote: Processing changes: refs: 1, done
remote: error: ref update is a no-op: DELETE: 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 refs/remotes/origin/sandbox/marslo/test
To ssh://gerrit.domain.com:29418/storage/ssdfw/devops/jenkins
 ! [remote rejected]   origin/sandbox/marslo/test (internal server error)
error: failed to push some refs to 'ssh://gerrit.domain.com:29418/storage/ssdfw/devops/jenkins'

to retrive

# fetch single ref
$ git fetch origin refs/remotes/archive/sandbox/marslo/test
From ssh://gerrit.domain.com:29418/storage/ssdfw/devops/jenkins
 * remote-tracking branch archive/sandbox/marslo/test -> FETCH_HEAD
$ git checkout FETCH_HEAD
HEAD is now at 749bd27d test

# fetch all ref
$ git fetch origin refs/remotes/archive/*:refs/archive/*
remote: Counting objects: 4507, done
remote: Finding sources: 100% (57/57)
remote: Total 57 (delta 20), reused 49 (delta 20)
Unpacking objects: 100% (57/57), 14.52 KiB | 424.00 KiB/s, done.
From ssh://gerrit.domain.com:29418/storage/ssdfw/devops/jenkins
 * [new ref]           archive/sandbox/marslo/test       -> refs/archive/sandbox/marslo/test
 * [new ref]           archive/sandbox/marslo/sandbox    -> refs/archive/sandbox/marslo/sandbox
 * [new ref]           archive/sandbox/marslo/sample     -> refs/archive/sandbox/marslo/sample

format

(subject) : "the subject line"
%(subject:sanitize) : "the-subject-line"

[!TIP]
field names
foramttinghttps://git-scm.com/docs/git-for-each-ref/2.21.0#Documentation/git-for-each-ref.txt---formatltformatgt
git/t/t6300-for-each-ref.sh
format:
%00 -> \0 (NUL)
%09 -> (tab)
%0a -> (LF)
field names:
head :
refname: -> refs/heads/master
refname:short -> master
refname:lstrip=1 -> heads/master
refname:lstrip=2 -> master
refname:lstrip=-1 -> master
refname:lstrip=-2 -> heads/master
refname:rstrip=1 -> refs/heads
refname:rstrip=2 -> refs
refname:rstrip=-1 -> refs
refname:rstrip=-2 -> refs/heads
refname:strip=1 -> heads/master
refname:strip=2 -> master
refname:strip=-1 -> master
refname:strip=-2 -> heads/master
upstream -> refs/remotes/origin/master
upstream:short -> origin/master
upstream:lstrip=2 -> origin/master
upstream:lstrip=-2 -> origin/master
upstream:rstrip=2 -> refs/remotes
upstream:rstrip=-2 -> refs/remotes
upstream:strip=2 -> origin/master
upstream:strip=-2 -> origin/master
push -> refs/remotes/myfork/master
push:short -> myfork/master
push:lstrip=1 -> remotes/myfork/master
push:lstrip=-1 -> master
push:rstrip=1 -> refs/remotes/myfork
push:rstrip=-1 -> refs
push:strip=1 -> remotes/myfork/master
push:strip=-1 -> master
objecttype -> commit
objectsize -> $((131 + hexlen))
objectsize:disk -> $disklen
deltabase -> $ZERO_OID
parent -> ''
parent:short -> ''
parent:short=1 -> ''
parent:short=10 -> ''
numparent -> 0
object -> ''
type -> ''
'*objectname' -> ''
'*objecttype' -> ''
author -> 'A U Thor <author@example.com> 1151968724 +0200'
authorname -> 'A U Thor'
authoremail -> '<author@example.com>'
authoremail:trim -> 'author@example.com'
authoremail:localpart -> 'author'
tag -> ''
tagger -> ''
taggername -> ''
taggeremail -> ''
taggeremail:trim -> ''
taggeremail:localpart -> ''
taggerdate -> ''
subject -> 'Initial'
subject:sanitize -> 'Initial'
contents:subject -> 'Initial'
body -> ''
contents:body -> ''
contents:signature -> ''
contents -> 'Initial'
HEAD -> '*'
objectname -> $(git rev-parse refs/heads/master)
objectname:short -> $(git rev-parse --short refs/heads/master)
objectname:short=1 -> $(git rev-parse --short=1 refs/heads/master)
objectname:short=10 -> $(git rev-parse --short=10 refs/heads/master)
tree -> $(git rev-parse refs/heads/master^{tree})
tree:short -> $(git rev-parse --short refs/heads/master^{tree})
tree:short=1 -> $(git rev-parse --short=1 refs/heads/master^{tree})
tree:short=10 -> $(git rev-parse --short=10 refs/heads/master^{tree})
authordate -> 'Tue Jul 4 01:18:44 2006 +0200'
committer -> 'C O Mitter <committer@example.com> 1151968723 +0200'
committername -> 'C O Mitter'
committeremail -> '<committer@example.com>'
committeremail:trim -> 'committer@example.com'
committeremail:localpart -> 'committer'
committerdate -> 'Tue Jul 4 01:18:43 2006 +0200'
objectname:short=1 -> $(git rev-parse --short=1 refs/heads/master)
objectname:short=10 -> $(git rev-parse --short=10 refs/heads/master)
creator -> 'C O Mitter <committer@example.com> 1151968723 +0200'
creatordate -> 'Tue Jul 4 01:18:43 2006 +0200'
tags:
refname -> refs/tags/testtag
refname:short -> testtag
upstream -> ''
push -> ''
objecttype -> tag
objectsize -> $((114 + hexlen))
objectsize:disk -> $disklen
'*objectsize:disk' -> $disklen
deltabase -> $ZERO_OID
'*deltabase' -> $ZERO_OID
tree -> ''
tree:short -> ''
tree:short=1 -> ''
tree:short=10 -> ''
parent -> ''
parent:short -> ''
parent:short=1 -> ''
parent:short=10 -> ''
numparent -> ''
type -> 'commit'
'*objecttype' -> 'commit'
author -> ''
authorname -> ''
authoremail -> ''
authoremail:trim -> ''
authoremail:localpart -> ''
authordate -> ''
committer -> ''
committername -> ''
committeremail -> ''
committeremail:trim -> ''
committeremail:localpart -> ''
committerdate -> ''
tag -> 'testtag'
body -> ''
contents:body -> ''
contents:signature -> ''
contents -> `'Tagging at 1151968727``
object -> $(git rev-parse refs/tags/testtag^0)
objectname -> $(git rev-parse refs/tags/testtag)
objectname:short -> $(git rev-parse --short refs/tags/testtag)
'*objectname' -> $(git rev-parse refs/tags/testtag^{})
tagger -> 'C O Mitter <committer@example.com> 1151968725 +0200'
taggername -> 'C O Mitter'
taggeremail -> '<committer@example.com>'
taggeremail:trim -> 'committer@example.com'
taggeremail:localpart -> 'committer'
taggerdate -> 'Tue Jul 4 01:18:45 2006 +0200'
creator -> 'C O Mitter <committer@example.com> 1151968725 +0200'
creatordate -> 'Tue Jul 4 01:18:45 2006 +0200'
subject -> 'Tagging at 1151968727'
subject:sanitize -> 'Tagging-at-1151968727'
contents:subject -> 'Tagging at 1151968727'

date format

[!TIP] references:
Specification for syntax of git dates
strftime
strftime
format:
relative
local
default
iso ( or iso8601 )
rfc ( or rfc2822 )
short
raw
format:%Y-%m-%d %I:%M %p
strftime :
%a : Abbreviated weekday name
%A : Full weekday name
%b : Abbreviated month name
%B : Full month name
%c : Date and time representation appropriate for locale
%d : Day of month as decimal number (01 – 31)
%H : Hour in 24-hour format (00 – 23)
%I : Hour in 12-hour format (01 – 12)
%j : Day of year as decimal number (001 – 366)
%m : Month as decimal number (01 – 12)
%M : Minute as decimal number (00 – 59)
%p : Current locale's A.M./P.M. indicator for 12-hour clock
%S : Second as decimal number (00 – 59)
%U : Week of year as decimal number, with Sunday as first day of week (00 – 53)
%w : Weekday as decimal number (0 – 6; Sunday is 0)
%W : Week of year as decimal number, with Monday as first day of week (00 – 53)
%x : Date representation for current locale
%X : Time representation for current locale
%y : Year without century, as decimal number (00 – 99)
%Y : Year with century, as decimal number
%% : Percent sign
%z, %Z : Either the time-zone name or time zone abbreviation, depending on registry settings

how to use

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate)'
Mon Aug 30 21:50:57 2021 +0800

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:relative)'
9 months ago

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:raw)'
1630331457 +0800

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:iso)'
2021-08-30 21:50:57 +0800

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:rfc)'
Mon, 30 Aug 2021 21:50:57 +0800

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:local)'
Mon Aug 30 21:50:57 2021

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:format:%Y-%m-%d %I:%M %p)'
2021-08-30 09:50 PM

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(committerdate:format:%Y-%m-%d %H:%M:%S)'
2021-08-30 21:50:57

color

[!TIP|label:usage:]
%(color:<color_name>)
%(color:reset)

example

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(color:yellow)%(committerdate:iso)%(color:reset)' \
                   --color
=always
2021-08-30 21:50:57 +0800

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(color:blue)%(committerdate:iso)%(color:reset)' \
                   --color=always
2021-08-30 21:50:57 +0800

condition

[!TIP|label:references:]
%(if)...%(then)...%(else)...%(end)
%(align:<number>,left) ... %(end)

example

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(if)%(committerdate)%(then)%(committerdate:format:%Y-%m-%d %I:%M %p)%(else)%(taggerdate:format:%Y-%m-%d %I:%M %p)%(end)'
2021-08-30 09:50 PM

$ git for-each-ref --sort=-taggerdate refs/tags \
                   --format='%(align:left,50)[%(objecttype) : %(refname:short)]%(end) (%(committerdate:format:%Y-%m-%d %H:%M)) <%(committername)>' \
                   --color \
                   --count=10
[commit : sandbox/marslo/tag-1]              (2021-08-30 21:50) <marslo>

alias

[alias]
  ### [p]retty [t]ag
  pt          = "!git for-each-ref --sort=-taggerdate refs/tags --format='%(color:red)%(objectname:short)%(color:reset) - %(align:left,38)%(color:bold yellow)[%(objecttype) : %(refname:short)]%(color:reset)%(end) %(subject) %(color:green)(%(if)%(taggerdate)%(then)%(taggerdate:format:%Y-%m-%d %H:%M)%(else)%(committerdate:format:%Y-%m-%d %H:%M)%(end))%(color:reset) %(color:blue)%(if)%(taggername)%(then)<%(taggername)>%(else)<%(committername)>%(end)%(color:reset)' --color --count=10"
  pts         = "!git for-each-ref --sort=-taggerdate refs/tags --format='%(color:red)%(objectname:short)%(color:reset) - %(color:bold yellow)[%(objecttype) : %(refname:short)]%(color:reset) - %(subject) %(color:green)(%(if)%(taggerdate)%(then)%(taggerdate:format:%Y-%m-%d %H:%M)%(else)%(committerdate:format:%Y-%m-%d %H:%M)%(end))%(color:reset) %(color:blue)%(if)%(taggername)%(then)<%(taggername)>%(else)<%(committername)>%(end)%(color:reset)' --color"

  ### [p]retty [b]ranch
  pb          = "! git for-each-ref refs/heads refs/remotes --sort=-committerdate --format='%(color:red)%(objectname:short)%(color:reset) - %(color:bold yellow)%(committerdate:format:%Y-%m-%d %H:%M:%S)%(color:reset) - %(align:left,20)%(color:cyan)<%(authorname)>%(color:reset)%(end) %(color:bold red)%(if)%(HEAD)%(then)* %(else)  %(end)%(color:reset)%(refname:short)' --color --count=10"
  pbs         = "! git for-each-ref refs/heads refs/remotes --sort=-committerdate --format='%(color:red)%(objectname:short)%(color:reset) - %(color:bold yellow)%(committerdate:format:%Y-%m-%d %H:%M:%S)%(color:reset) - %(align:left,20)%(color:cyan)<%(authorname)>%(color:reset)%(end) %(color:bold red)%(if)%(HEAD)%(then)* %(else)  %(end)%(color:reset)%(refname:short)' --color"