$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mlgmpidl.git /var/lib/mock/f42-build-3442803-45457/root/chroot_tmpdir/scmroot/ocaml-mlgmpidl
Cloning into '/var/lib/mock/f42-build-3442803-45457/root/chroot_tmpdir/scmroot/ocaml-mlgmpidl'...
$ git fetch origin 321d25f0194ae5cc50a7542a15a81156af435b14:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mlgmpidl
 * [new ref]         321d25f0194ae5cc50a7542a15a81156af435b14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 321d25f Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild