This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/fetchmail:6.5.7
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/fetchmail:6.5.7-4.226
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/fetchmail:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.