[kingfishr]

We don't have immediate plans for other VCSs.

None of the people who built Barkeep use other VCSs on a regular basis, and we initially built it around our own needs.

Right now our code is tightly tied to grit (https://github.com/mojombo/grit/). We plan on moving off of grit at some point (perhaps to libgit2/rugged), and that would be a good time to abstract our VCS layer, opening up the possibility for use with other systems besides git.