Oops, the test I did in the second test is bogus (I didn't test as root).

However, it appears that owner validation is properly disabled:

[inside the pulled guix]

> scheme@(guix-user)> ,m (guix git)
> scheme@(guix git)> (owner-validation?) --> #true
> scheme@(guix git)> (with-libgit2 (owner-validation?)) --> #false
Greetings,
Maxime.