$ git clone -n https://src.fedoraproject.org/rpms/matrix-synapse.git /var/lib/mock/f40-build-2317143-58116/root/chroot_tmpdir/scmroot/matrix-synapse
Cloning into '/var/lib/mock/f40-build-2317143-58116/root/chroot_tmpdir/scmroot/matrix-synapse'...
$ git fetch origin 1e052b8b7a79dc1c9fac277f63827f72af768271:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/matrix-synapse
 * [new ref]         1e052b8b7a79dc1c9fac277f63827f72af768271 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e052b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild