This tool is designed to work with Git, not Github. The stats you are referring to would need to be made available by Github.

Actually, if you look at the project more closely, it does support github. In fact, there's even a derivative project that directly interacts with github. However, I think the point of this poster's comment was that this project's scope doens't include ey's needs, not that it doesn't interface with a particular service (I, of course, could be wrong in that interpretation).