If you would like to use git locally against the TFS repositories you can use git-tfs.
You can install git from the Windows installer: http://git-scm.com/downloads.
I prefer to install the bash command line and all the Unix tools. You may still prefer to use the GUI which is installed at the same time.
Then you can install git-tfs via chocolatey.
Note: If you don't have chocolatey goodness yet then see the Chocolatey Install section below.