$ git clone -n https://src.fedoraproject.org/rpms/cave9.git /var/lib/mock/f40-build-2283428-55588/root/chroot_tmpdir/scmroot/cave9
Cloning into '/var/lib/mock/f40-build-2283428-55588/root/chroot_tmpdir/scmroot/cave9'...
$ git fetch origin b5d27d2b8eb8f1dbe41e11e73d721ae7a70a56af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cave9
 * [new ref]         b5d27d2b8eb8f1dbe41e11e73d721ae7a70a56af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5d27d2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild