Moin Moin,
when using the git tab completions, it is annoying to update your .bash_profile when upgrading git to a new version, Assuming you have installed git via brew, you can automatically detect the version number with a small regex. Just update the lines in your .bash_profile i showed in http://andywenk.tumblr.com/post/43643531926/git-tab-completion-on-mac-os-x-when-installed-via with this:
have fun!
Cheers