$ git clone -n https://src.fedoraproject.org/rpms/xscreensaver.git /var/lib/mock/f40-build-2648513-66784/root/chroot_tmpdir/scmroot/xscreensaver
Cloning into '/var/lib/mock/f40-build-2648513-66784/root/chroot_tmpdir/scmroot/xscreensaver'...
$ git fetch origin 16ff1169f9bc132275ea79e7b8c790b4d13ed08b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xscreensaver
 * [new ref]         16ff1169f9bc132275ea79e7b8c790b4d13ed08b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16ff116 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild