$ git clone -n https://src.fedoraproject.org/rpms/ghc-union-find.git /var/lib/mock/f40-build-777482-129377/root/chroot_tmpdir/scmroot/ghc-union-find
Cloning into '/var/lib/mock/f40-build-777482-129377/root/chroot_tmpdir/scmroot/ghc-union-find'...
$ git fetch origin 6669040f4aa38a74eaf4e94becd0d8a460544d3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-union-find
 * [new ref]         6669040f4aa38a74eaf4e94becd0d8a460544d3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6669040 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild