$ git clone -n https://src.fedoraproject.org/rpms/ocaml-opam-0install.git /var/lib/mock/f41-build-821684-152618/root/chroot_tmpdir/scmroot/ocaml-opam-0install
Cloning into '/var/lib/mock/f41-build-821684-152618/root/chroot_tmpdir/scmroot/ocaml-opam-0install'...
$ git fetch origin d1c465a1954afd16a4b95081871235a244012ec4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-opam-0install
 * [new ref]         d1c465a1954afd16a4b95081871235a244012ec4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1c465a Initial RPM