Git Extras
GIT utilities, repo summary, repl, changelog population, and more
...Supports several sub-commands such as git-ignore, git-setup, git-summary, git-changelog, git-effort, etc. Some commands require extra dependencies which are unavailable in some platforms. You may need to install them manually. Note that only the Homebrew package is maintained by the git-extras developers directly. Other packages are maintained by the distribution's packagers or third-party volunteers. Installing from Homebrew will not give you the option omit certain git-extras if they conflict with existing git aliases. To have this option, build from source.