使用Git和Visual Studio结帐项目

I recently started using Git with Visual Studio 2015 and I'm trying to modify the properties of an installer project. The issue is that it won't let me because the project isn't checked out and I don't see an option to check out the project with Git through Visual Studio. The only place I even see the mention of the words 'Check Out' is under branches and it's grayed out.I recently started using Git with Visual Studio