$ git clone -n https://github.com/xcp-ng-rpms/xs-opam-repo.git /var/lib/mock/v7.99-base-541-249/root/chroot_tmpdir/scmroot/xs-opam-repo
Cloning into '/var/lib/mock/v7.99-base-541-249/root/chroot_tmpdir/scmroot/xs-opam-repo'...
$ git reset --hard 0f308c7befa3df2ddd10beb193aca00ffd5a8f4e
HEAD is now at 0f308c7 Bump subrel for rebuild