How do you exit vimdiff mode in vim, specifically, for Fugitive?

Question

I am using vim with the fugitive extension. It has a :Gdiff command which brings you into vimdiff mode, but what is the right/quick way to close/quit vimdiff mode?

I.e.,

Answer 1

Running :Gwrite after merging to your satisfaction will close the other two diff panes in addition to updating the git cache to mark the file as merged.