$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mlgmpidl.git /var/lib/mock/f42-build-865521-173241/root/chroot_tmpdir/scmroot/ocaml-mlgmpidl
Cloning into '/var/lib/mock/f42-build-865521-173241/root/chroot_tmpdir/scmroot/ocaml-mlgmpidl'...
$ git fetch origin 0e9546a8235939afd98069d228b50b60fcf97256:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mlgmpidl
 * [new ref]         0e9546a8235939afd98069d228b50b60fcf97256 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e9546a OCaml 5.3.0 rebuild for Fedora 42