$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ocamlgraph.git /var/lib/mock/f42-build-side-1-3517070-46096/root/chroot_tmpdir/scmroot/ocaml-ocamlgraph
Cloning into '/var/lib/mock/f42-build-side-1-3517070-46096/root/chroot_tmpdir/scmroot/ocaml-ocamlgraph'...
$ git fetch origin b1f98dcd919b7b24b23685da2b7b3f1d7400160c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ocamlgraph
 * [new ref]         b1f98dcd919b7b24b23685da2b7b3f1d7400160c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1f98dc Version 2.2.0