$ git clone -n https://github.com/xcp-ng-rpms/xs-opam-src.git /var/lib/mock/v8.0-base-1003-405/root/chroot_tmpdir/scmroot/xs-opam-src
Cloning into '/var/lib/mock/v8.0-base-1003-405/root/chroot_tmpdir/scmroot/xs-opam-src'...
$ git reset --hard 7d3d5099ff5a38e171ccd2f01ef541346b4a1857
HEAD is now at 7d3d509 Merge branch 'XS-8.0'