This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubevirt/virt-handler:1.4.0
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubevirt/virt-handler:1.4.0-1.1
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/kubevirt/virt-handler:1.4.0.18.213

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.