Ok, would my original patch for it 
<https://debbugs.gnu.org/cgi/bugreport.cgi?att=1;bug=23076;filename=remote-vc-git-windows.patch;msg=53> 
count as a safer way? It uses internal tramp function, as discussed 
before, but the change itself is local to vc-git.

-- 
Best Regards,
Nikolay Kudryavtsev