bug#71678: Support git commits signed with ssh keys in guix git authenticate

[jgart]

Hi MSavoritias,

Feel free to send a patch when libgit2 gets support so we can discuss
this addition further amongst the Guix community. Additionally, I would
send your idea to the guix-devel mailing list before sending patches to
see what people think there.

I am going to close this issue for now to keep the backlog of open issues down
since this will probably be a while.

-- 
all the best,
jgart