This container can be pulled via:
  docker pull registry.opensuse.org/kubevirt/pr-helper:1.2.1
  docker pull registry.opensuse.org/kubevirt/pr-helper:1.2.1-1.1
  docker pull registry.opensuse.org/kubevirt/pr-helper:1.2.1.3.42

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.