Git was designed to support better configuration management of the Linux operating system open source project.
But, so what?
Maybe the real point is that Git's success in areas far beyond its original intent just reiterates how highly it's regarded. Or, better yet - that nothing is ever used as its intended.
The real point of this post was simply to catalog an issue Google search results haven't yet found a good hit for:
If you see red 'X' overlay icons on folders in your local git tree, on Windows, and there's NOTHING YOU CAN DO TO GET RID OF THEM, it's likely your git cache is corrupt and needs to be reset. Either restart your machine or kill the TGitCache.exe process. Then relaunch your Explorer window. Red 'X's should dissappear.