The legacy service-pipeline-* jobs supported responding to git tag (and perhaps other ref) updates but that functionality was lost when PipelineBuilder was implemented. The latter should be refactored to provide the same functionality, at the very least setting a setup.git_tag context variable that can be used to tag built images with the git tag, but possibly automatically including the tag/ref value in the default list of image tags.
See integration/config/jjb/service-pipeline.groovy for a reference implementation.