Yes. And my initial thought was that this would also override whatever is set in Lastmod (which is probably stale and old by now).
So: If EnableGitInfo is true, lastmod will always equal the latest Git revision for that file. In addition you can use the rest of the attributes in the GitInfo object (author etc?)
I have figured a way to make this Git integration really fast, so I will probably cook up a complete solution in a day or two.