$ git clone -n https://src.fedoraproject.org/rpms/gtk+extra.git /var/lib/mock/f40-build-2294956-56301/root/chroot_tmpdir/scmroot/gtk+extra
Cloning into '/var/lib/mock/f40-build-2294956-56301/root/chroot_tmpdir/scmroot/gtk+extra'...
$ git fetch origin fb7fa6a8a6446bb9b91b15712646c84ee404bbe9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtk+extra
 * [new ref]         fb7fa6a8a6446bb9b91b15712646c84ee404bbe9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb7fa6a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild