$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-cold.git /var/lib/mock/f38-build-side-42-init-devel-748120-27661/root/chroot_tmpdir/scmroot/ocaml-ppx-cold
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-748120-27661/root/chroot_tmpdir/scmroot/ocaml-ppx-cold'...
$ git fetch origin 0307f38f8647cb00bd339f19c1484ca6f7f2082c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-cold
 * [new ref]         0307f38f8647cb00bd339f19c1484ca6f7f2082c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0307f38 Rebuild OCaml packages for F38