$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mdx.git /var/lib/mock/f38-build-side-42-init-devel-780739-27896/root/chroot_tmpdir/scmroot/ocaml-mdx
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-780739-27896/root/chroot_tmpdir/scmroot/ocaml-mdx'...
$ git fetch origin 56e94776826c8b259226dd50e5b6cd6d5a46eb23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mdx
 * [new ref]         56e94776826c8b259226dd50e5b6cd6d5a46eb23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56e9477 Rebuild for ocaml-csexp 1.5.2