bug#42156: Guix unnecessarily rebuilds packages when replacing a source with --with-git-url

[Ludovic Courtès]

pkill9 <pki...@runbox.com> skribis:

> Running `guix build 
> --with-git-url=youtube-dl=https://github.com/ytdl-org/youtube-dl mpv -n`
> shows it will rebuild packages unecessarily:

Merged with <https://issues.guix.gnu.org/38100>.

Thanks,
Ludo’.