This container can be pulled via:
  docker pull registry.opensuse.org/kubevirt/virt-controller:1.2.0
  docker pull registry.opensuse.org/kubevirt/virt-controller:1.2.0-2.1
  docker pull registry.opensuse.org/kubevirt/virt-controller:1.2.0.8.7

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.