$ git clone -n https://src.fedoraproject.org/rpms/matrix-synapse.git /var/lib/mock/f39-build-2356044-60293/root/chroot_tmpdir/scmroot/matrix-synapse
Cloning into '/var/lib/mock/f39-build-2356044-60293/root/chroot_tmpdir/scmroot/matrix-synapse'...
$ git fetch origin 86504bb7926aa813bf5ff248a15b03b760d8e02b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matrix-synapse
 * [new ref]         86504bb7926aa813bf5ff248a15b03b760d8e02b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86504bb Update to v1.100.0