So with Visual Studio 2015 just being released there is a much more integrated tie-in with git.
However the feature that seems to be lacking is git over SSH. There
Conforming to BPas: for Visual Studio 2015 it is possible to build SSH enabled version. Moreover, i have patch for public/private key auth support:
https://github.com/PROGrand/git2-msvstfs-ssh-patch