This container can be pulled via:
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp5/kbuild-gitlab:15.5
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp5/kbuild-gitlab:15.5.16.20
  docker pull registry.opensuse.org/kernel/tools/images/sle_15_sp5/kbuild-gitlab:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.