Find git-dir so that git-fat can run within a git filter-branch or a bare repository.
Find git-dir so that git-fat can run within a git filter-branch or a
bare repository.

cnweibo/git-fat,wikimedia/operations-debs-git-fat,wikimedia/git-fat,michaelcontento/git-fat,wikimedia/git-fat,grahamgilbert/git-fat,cyaninc/git-fat,michaelcontento/git-fat,ciena-blueplanet/git-fat,PersonifyInc/git-fat,ajohnson23/git-fat,cnweibo/git-fat,jedbrown/git-fat,ajohnson23/git-fat,ciena-blueplanet/git-fat,PersonifyInc/git-fat,lpsinger/git-fat,cyaninc/git-fat,jedbrown/git-fat,grahamgilbert/git-fat,wikimedia/operations-debs-git-fat,lpsinger/git-fat