$ git clone -n https://src.fedoraproject.org/rpms/ocaml-variantslib.git /var/lib/mock/f40-build-784155-133254/root/chroot_tmpdir/scmroot/ocaml-variantslib
Cloning into '/var/lib/mock/f40-build-784155-133254/root/chroot_tmpdir/scmroot/ocaml-variantslib'...
$ git fetch origin 243cb0c1ca6471405e50bd72787e8372724ccede:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-variantslib
 * [new ref]         243cb0c1ca6471405e50bd72787e8372724ccede -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 243cb0c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild