$ git clone -n https://src.fedoraproject.org/rpms/ocaml-lacaml.git /var/lib/mock/f43-build-side-114891-61011469-6587666/root/chroot_tmpdir/scmroot/ocaml-lacaml
Cloning into '/var/lib/mock/f43-build-side-114891-61011469-6587666/root/chroot_tmpdir/scmroot/ocaml-lacaml'...
$ git fetch origin 515ada6286885eef349c4a951b5e2a9c5a1ae86c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-lacaml
 * [new ref]         515ada6286885eef349c4a951b5e2a9c5a1ae86c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 515ada6 Rebuild to fix OCaml dependencies