$ git clone -n https://src.fedoraproject.org/rpms/cpu-x.git /var/lib/mock/f40-build-790476-136595/root/chroot_tmpdir/scmroot/cpu-x
Cloning into '/var/lib/mock/f40-build-790476-136595/root/chroot_tmpdir/scmroot/cpu-x'...
$ git fetch origin 5108ea63f9d50154454097c0074efa69642f65ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpu-x
 * [new ref]         5108ea63f9d50154454097c0074efa69642f65ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5108ea6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild