place holder to extract information from commits

link -- https://git-scm.com/docs/pretty-formats

Placeholders that expand to information extracted from the commit:

%H

commit hash

%h

abbreviated commit hash

%T

tree hash

%t

abbreviated tree hash

%P

parent hashes

%p

abbreviated parent hashes

%an

author name

%aN

author name (respecting .mailmap, see git-shortlog[1] or git-blame[1])

%ae

author email

%aE

author email (respecting .mailmap, see git-shortlog[1] or git-blame[1])

%al

author email local-part (the part before the @ sign)

%aL

author local-part (see %al) respecting .mailmap, see git-shortlog[1] or git-blame[1])

%ad

author date (format respects --date= option)

%aD

author date, RFC2822 style

%ar

author date, relative

%at

author date, UNIX timestamp

%ai

author date, ISO 8601-like format

%aI

author date, strict ISO 8601 format

%as

author date, short format (YYYY-MM-DD)

%ah

author date, human style (like the --date=human option of git-rev-list[1])

%cn

committer name

%cN

committer name (respecting .mailmap, see git-shortlog[1] or git-blame[1])

%ce

committer email

%cE

committer email (respecting .mailmap, see git-shortlog[1] or git-blame[1])

%cl

committer email local-part (the part before the @ sign)

%cL

committer local-part (see %cl) respecting .mailmap, see git-shortlog[1] or git-blame[1])

%cd

committer date (format respects --date= option)

%cD

committer date, RFC2822 style

%cr

committer date, relative

%ct

committer date, UNIX timestamp

%ci

committer date, ISO 8601-like format

%cI

committer date, strict ISO 8601 format

%cs

committer date, short format (YYYY-MM-DD)

%ch

committer date, human style (like the --date=human option of git-rev-list[1])

%d

ref names, like the --decorate option of git-log[1]

%D

ref names without the " (", ")" wrapping.