For GitLab PRs for the OpenJDK packages (java-1.8.0-openjdk, java-11-openjdk, java-17-openjdk, java-21-openjdk), the test build needs to use the java-openjdk-* targets created in CS-1618 in order for the build to succeed. The default setup will never succeed as the build will be unable to find the java-*-openjdk-portable builds which are only present in the java-openjdk-* targets (see [PR](https://gitlab.com/redhat/centos-stream/rpms/java-21-openjdk/-/merge_requests/5), [portable build](https://kojihub.stream.rdu2.redhat.com/koji/buildinfo?buildID=47108))

For java-1.8.0-openjdk, java-11-openjdk, java-17-openjdk & java-21-openjdk, the branch to target mapping should be as follows:

openjdk-portable-centos-8 -> java-openjdk-portable-build (though this is fine in the default for scratch)

c8s-> java-openjdk-c8s-build

c9s-> java-openjdk-c9s-build

c10s-> java-openjdk-c10s-build (depends on CS-2012)

The last three all depend on the portable builds created in java-openjdk-portable-build and so will not work with plain c8s-build, c9s-build and c10s-build targets.