$ git clone -n https://src.fedoraproject.org/rpms/diffstat.git /var/lib/mock/f40-build-2276643-55173/root/chroot_tmpdir/scmroot/diffstat
Cloning into '/var/lib/mock/f40-build-2276643-55173/root/chroot_tmpdir/scmroot/diffstat'...
$ git fetch origin 9abddcda1e3ababebe6df8da950ddcae90de6c1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/diffstat
 * [new ref]         9abddcda1e3ababebe6df8da950ddcae90de6c1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9abddcd Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild