$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppxlib.git /var/lib/mock/f45-build-20696-573/root/chroot_tmpdir/scmroot/ocaml-ppxlib
Cloning into '/var/lib/mock/f45-build-20696-573/root/chroot_tmpdir/scmroot/ocaml-ppxlib'...
$ git fetch origin 4f93187eafe03f08fc838a910f76b1199cc341c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppxlib
 * [new ref]         4f93187eafe03f08fc838a910f76b1199cc341c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f93187 Bump release and rebuild