This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6.3
  docker pull registry.opensuse.org/opensuse/virt-handler:1.6.3-6.41
  docker pull registry.opensuse.org/opensuse/virt-handler:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.