This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/fetchmail:6.5.4
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/fetchmail:6.5.4-11.335
  docker pull registry.opensuse.org/devel/kubic/containers/container/opensuse/fetchmail:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.