$ git clone -n https://src.fedoraproject.org/rpms/google-cpu_features.git /var/lib/mock/f40-build-764347-122934/root/chroot_tmpdir/scmroot/google-cpu_features
Cloning into '/var/lib/mock/f40-build-764347-122934/root/chroot_tmpdir/scmroot/google-cpu_features'...
$ git fetch origin 093c86b8dcfce7551e5fdfa134962a4cd930575a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-cpu_features
 * [new ref]         093c86b8dcfce7551e5fdfa134962a4cd930575a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 093c86b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild