$ git clone -n https://src.fedoraproject.org/rpms/ocaml-uunf.git /var/lib/mock/f41-build-857042-167866/root/chroot_tmpdir/scmroot/ocaml-uunf
Cloning into '/var/lib/mock/f41-build-857042-167866/root/chroot_tmpdir/scmroot/ocaml-uunf'...
$ git fetch origin f52dc6d0f70973ffdbce96d834baca1546c730c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-uunf
 * [new ref]         f52dc6d0f70973ffdbce96d834baca1546c730c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f52dc6d Version 16.0.0