$ git clone -n https://src.fedoraproject.org/rpms/matchbox-window-manager.git /var/lib/mock/f40-build-2296969-56427/root/chroot_tmpdir/scmroot/matchbox-window-manager
Cloning into '/var/lib/mock/f40-build-2296969-56427/root/chroot_tmpdir/scmroot/matchbox-window-manager'...
$ git fetch origin 21a6cf9f3e2b75df35b0376ddd97d1dd500e3a81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matchbox-window-manager
 * [new ref]         21a6cf9f3e2b75df35b0376ddd97d1dd500e3a81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21a6cf9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild