If your team uses TFS and you want to use Git you might want to consider a "git to tfs" bridge. Essentially you work day to day using Git on your computer, then when you want to push your changes you push them to the TFS server.
There are a couple out there (on github). I used one at my last place (along with another developer) with some success. See:
https://github.com/spraints/git-tfs
https://github.com/git-tfs/git-tfs
