feature request: return from diff to overview

One feature that I am really missing is to return from a file diff to the diff overview:

1) :Gitv
2) Select a commit with
3) Switch to the new buffer and select a file(fold) with
4) Look at changes ..

What I am missing is a quick way back from 4) to 2). Its the most common use case for me when I am reviewing code: I want to look at all changes in all files .. Should probably not be too hard ?