$ git clone -n https://src.fedoraproject.org/rpms/ocaml-cmdliner.git /var/lib/mock/f45-build-20488-571/root/chroot_tmpdir/scmroot/ocaml-cmdliner
Cloning into '/var/lib/mock/f45-build-20488-571/root/chroot_tmpdir/scmroot/ocaml-cmdliner'...
$ git fetch origin f6b17940bdf2a674ced57deb4e36f6d36db72a89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-cmdliner
 * [new ref]         f6b17940bdf2a674ced57deb4e36f6d36db72a89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6b1794 Bump and rebuild again