$ git clone -n https://src.fedoraproject.org/rpms/ocaml-gen.git /var/lib/mock/f39-build-1906774-42871/root/chroot_tmpdir/scmroot/ocaml-gen
Cloning into '/var/lib/mock/f39-build-1906774-42871/root/chroot_tmpdir/scmroot/ocaml-gen'...
$ git fetch origin ed7b46a809c1c3735c21e14dda6486f0e9057401:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-gen
 * [new ref]         ed7b46a809c1c3735c21e14dda6486f0e9057401 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed7b46a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild