$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-optcomp.git /var/lib/mock/f40-build-2300023-56685/root/chroot_tmpdir/scmroot/ocaml-ppx-optcomp
Cloning into '/var/lib/mock/f40-build-2300023-56685/root/chroot_tmpdir/scmroot/ocaml-ppx-optcomp'...
$ git fetch origin 675fac0d7573c7fb4951566d70383493c0a4f230:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-optcomp
 * [new ref]         675fac0d7573c7fb4951566d70383493c0a4f230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 675fac0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild