$ git clone -n https://src.fedoraproject.org/rpms/matrix-synapse.git /var/lib/mock/f40-build-780089-130672/root/chroot_tmpdir/scmroot/matrix-synapse
Cloning into '/var/lib/mock/f40-build-780089-130672/root/chroot_tmpdir/scmroot/matrix-synapse'...
$ git fetch origin 075e6e57da9a80cb43aed699f51339ab3981b677:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matrix-synapse
 * [new ref]         075e6e57da9a80cb43aed699f51339ab3981b677 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 075e6e5 Update to v1.101.0