This container can be pulled via:
  docker pull registry.opensuse.org/virtualization/containerfile/kubevirt/virt-exportserver:1.3.1
  docker pull registry.opensuse.org/virtualization/containerfile/kubevirt/virt-exportserver:1.3.1-Virt.1699.186.14
  docker pull registry.opensuse.org/virtualization/containerfile/kubevirt/virt-exportserver:1.3.1.Virt.1699.15.243

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.