$ git clone -n https://src.fedoraproject.org/rpms/fortune-firefly.git /var/lib/mock/f40-build-1996697-44046/root/chroot_tmpdir/scmroot/fortune-firefly
Cloning into '/var/lib/mock/f40-build-1996697-44046/root/chroot_tmpdir/scmroot/fortune-firefly'...
$ git fetch origin d0d75c7d1e96f0bb2c168d92ef169f2d0599a16a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fortune-firefly
 * [new ref]         d0d75c7d1e96f0bb2c168d92ef169f2d0599a16a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0d75c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild