$ git clone -n https://src.fedoraproject.org/rpms/0xFFFF.git /var/lib/mock/f40-build-800686-143611/root/chroot_tmpdir/scmroot/0xFFFF
Cloning into '/var/lib/mock/f40-build-800686-143611/root/chroot_tmpdir/scmroot/0xFFFF'...
$ git fetch origin ddfcc1184bc2e3b2688252168b2681b31027e9d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/0xFFFF
 * [new ref]         ddfcc1184bc2e3b2688252168b2681b31027e9d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddfcc11 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild