$ git clone -n https://src.fedoraproject.org/rpms/matrix-synapse.git /var/lib/mock/f39-build-1889707-42792/root/chroot_tmpdir/scmroot/matrix-synapse
Cloning into '/var/lib/mock/f39-build-1889707-42792/root/chroot_tmpdir/scmroot/matrix-synapse'...
$ git fetch origin 46affde9b74ef2805aa583246c9286e7edf384c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matrix-synapse
 * [new ref]         46affde9b74ef2805aa583246c9286e7edf384c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46affde Update to v1.97.0