This container can be pulled via:
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp3/kbuild-gitlab:15.3
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp3/kbuild-gitlab:15.3.bp153.10.5
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp3/kbuild-gitlab:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.