Show total blame count for files with unstaged changes or calculate the change in blame between two revisions. Part of
git-extras
. More information: https://github.com/tj/git-extras/blob/master/Commands.md#git-guilt.
git guilt
git guilt first_revision last_revision
git guilt --email
git guilt --ignore-whitespace
git guilt 'git log --until="3 weeks ago" --format="%H" -n 1'
git guilt @{3.weeks.ago}