Vimdiff и Git все сразу

You could use the vim plugins published here. Then you just need to set the difftool:

[multidiff] tool = vd -f 

As an alternative application I would suggest meld, which will show you modified files - you can then select just the files who's diffs you want to see.

See the screenshot here for an example.

Further to Marcos useful comment, as a third (manual alternative) if you want to use vimdiff I would recommend following meld's strategy in a script (possibly python):

• use git diff-files --name-status and git diff-index --name-status --cached HEAD to identify files that need to be examined.
• Get cached versions of these files and place in /tmp/
• Open all of these files - the changed files and their cached versions - at once in vimdiff - though most likely not possible in the sense that you require- see below.

However, as vimdiff itself doesn't seem to handle multiple diff tabs natively I recommend one of my other suggestions above.