$ git clone -n https://src.fedoraproject.org/rpms/ocaml-octavius.git /var/lib/mock/f38-build-side-42-init-devel-748091-27661/root/chroot_tmpdir/scmroot/ocaml-octavius
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-748091-27661/root/chroot_tmpdir/scmroot/ocaml-octavius'...
$ git fetch origin bd3ffa4e589a856f1cad6fbb7a77190f41c7115e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-octavius
 * [new ref]         bd3ffa4e589a856f1cad6fbb7a77190f41c7115e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd3ffa4 Rebuild OCaml packages for F38