Hi Dmitry,

>> So if using ‘git apply --cached’ is the preferred solution,
>> then I could finish the patch with it.
>
> I don't have a particularly strong opinion, but the approach with 'git
> apply --cached' followed by 'git commit' seems easier to implement and
> avoids changing the file contents on disk, or risking any of the
> stashes. So I'd try implementing it first and then see if the remaining
> problems are worth the trouble of doing it in a more difficult way.

This is implemented now, and I'm already using it without problems.
Please review this patch: