$ git clone -n https://src.fedoraproject.org/rpms/ocaml-gen.git /var/lib/mock/f42-build-3421862-45166/root/chroot_tmpdir/scmroot/ocaml-gen
Cloning into '/var/lib/mock/f42-build-3421862-45166/root/chroot_tmpdir/scmroot/ocaml-gen'...
$ git fetch origin 9bc34ecfb30220a3c85c35398a18ae1aecfad32d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-gen
 * [new ref]         9bc34ecfb30220a3c85c35398a18ae1aecfad32d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9bc34ec Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild