$ git clone -n https://src.fedoraproject.org/rpms/R-waldo.git /var/lib/mock/f40-build-2270227-54797/root/chroot_tmpdir/scmroot/R-waldo
Cloning into '/var/lib/mock/f40-build-2270227-54797/root/chroot_tmpdir/scmroot/R-waldo'...
$ git fetch origin a6069eef829cd8ecf12514d19d0b590c13e887b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-waldo
 * [new ref]         a6069eef829cd8ecf12514d19d0b590c13e887b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6069ee Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild