$ git clone -n https://src.fedoraproject.org/rpms/matrix-synapse.git /var/lib/mock/f38-build-728047-101003/root/chroot_tmpdir/scmroot/matrix-synapse
Cloning into '/var/lib/mock/f38-build-728047-101003/root/chroot_tmpdir/scmroot/matrix-synapse'...
$ git fetch origin cc90b999fd5771d27d9ebcd126e2df405dd00f28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matrix-synapse
 * [new ref]         cc90b999fd5771d27d9ebcd126e2df405dd00f28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc90b99 Update to v1.85.2