This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/tumbleweed:20190329
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/tumbleweed:20190329.6.64
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/tumbleweed:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.