$ git clone -n https://src.fedoraproject.org/rpms/reflections.git /var/lib/mock/f40-build-2257384-54317/root/chroot_tmpdir/scmroot/reflections
Cloning into '/var/lib/mock/f40-build-2257384-54317/root/chroot_tmpdir/scmroot/reflections'...
$ git fetch origin 838527d329ce7462b5ab7bbb8aa7d7da73c5db42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reflections
 * [new ref]         838527d329ce7462b5ab7bbb8aa7d7da73c5db42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 838527d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild