${t}

Build #${it.build.number}

This build is labeled:

Label	Description	Owner	Revision
${entry}	${it.getLabel(entry).description}	${it.getLabel(entry).ownerName}	${it.getLabel(entry).revisionSpec}

Create a Perforce Automatic label:

The Label's view is based on the workspace used during the build and Revision is set to change number: ${it.change}.

Label Name:
Description:	JenkinsBuild: #${it.build.number}