I have pushed (git://git.kernel.org/pub/scm/qgit/qgit.git) some patches to add file rename/copy detection to qgit.
It was harder then expected due to some subtle details, and still the merge combined case is missing, anyhow I think feature is usable and should be quite stable.
If someone is interested it would be great to give it a try because testing is required.
BTW it is now possible to view file rename/copy info in patch view as well in file list (see screenshot), both views are synced and old commands (as example double-clicking on file name) should still work as expected.
Screenshot: http://digilander.libero.it/mcostalba/rename_copy.png
Thanks Marco