$ git clone -n https://src.fedoraproject.org/rpms/prunerepo.git /var/lib/mock/f40-build-2632876-65903/root/chroot_tmpdir/scmroot/prunerepo
Cloning into '/var/lib/mock/f40-build-2632876-65903/root/chroot_tmpdir/scmroot/prunerepo'...
$ git fetch origin e7ddc04782be17e16c1143bb2d5b419dc3d46e2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prunerepo
 * [new ref]         e7ddc04782be17e16c1143bb2d5b419dc3d46e2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7ddc04 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild