This is an example provided by the Author Andrew May:

<target name="promoteDevelopment">
  <pvcspromote repository="/pvcs/proj1"
               pvcsproject="/"
               promotionGroup="Development"
               configFile="/pvcs/proj1/archives/cv3asde.cfg"/>
</target>

In the ant-dev-mailing list you will find an  extension written by Andrew May for ANTS-optional PVCS-Task. which provided this kind of functionality. His motivation, source-code and documentation can be found here: http://marc.theaimsgroup.com/?l=ant-dev&m=99667939904467&w=2