$ git clone -n https://github.com/xcp-ng-rpms/xs-opam-repo.git /var/lib/mock/v8.3-testing-4511-4771/root/chroot_tmpdir/scmroot/xs-opam-repo
Cloning into '/var/lib/mock/v8.3-testing-4511-4771/root/chroot_tmpdir/scmroot/xs-opam-repo'...
$ git reset --hard 188b5fb177251c72f60f3966be89d500c49bf231
Downloading SOURCES/xs-opam-repo-6.66.0.tar.gz (15 MB)
HEAD is now at 188b5fb Merge branch 'XS-8.3'