Re: [PATCH] fetch: avoid quadratic loop checking for updated submodules

Jeff King [off-list ref] writes:

Also also. I was a little turned off by the fact that every fetch is
going to do the equivalent of "git log --raw -m $new --not $old",
whether you have submodules or not.

Notice I called your patch solving "the other half"?
See http://thread.gmane.org/gmane.comp.version-control.git/181101