This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6.2
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6.2-2.17

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.