$ git clone -n https://github.com/xcp-ng-rpms/xs-opam-repo.git /var/lib/mock/v8.3-u-asultanov1-8971-27889/root/chroot_tmpdir/scmroot/xs-opam-repo
Cloning into '/var/lib/mock/v8.3-u-asultanov1-8971-27889/root/chroot_tmpdir/scmroot/xs-opam-repo'...
$ git fetch origin b95f4c2a8db5cc717715f5147b08c01b7d303b3f:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xs-opam-repo
 * [new ref]         b95f4c2a8db5cc717715f5147b08c01b7d303b3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b95f4c2 Merge branch 'XS-8.3' into asv/rebase-july-2025