$ git clone -n https://src.fedoraproject.org/rpms/ocaml-fmt.git /var/lib/mock/f40-build-783948-133234/root/chroot_tmpdir/scmroot/ocaml-fmt
Cloning into '/var/lib/mock/f40-build-783948-133234/root/chroot_tmpdir/scmroot/ocaml-fmt'...
$ git fetch origin 54d48aafbf05b6e5a646618ea39e755f72b5818a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-fmt
 * [new ref]         54d48aafbf05b6e5a646618ea39e755f72b5818a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54d48aa Bump and rebuild