$ git clone -n https://src.fedoraproject.org/rpms/ocaml-odoc.git /var/lib/mock/f40-build-784598-133494/root/chroot_tmpdir/scmroot/ocaml-odoc
Cloning into '/var/lib/mock/f40-build-784598-133494/root/chroot_tmpdir/scmroot/ocaml-odoc'...
$ git fetch origin d4899156bc7cec68be25de814c91749a9d61da94:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-odoc
 * [new ref]         d4899156bc7cec68be25de814c91749a9d61da94 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d489915 Rebuild for ocaml-mdx 2.4.0