Each service can define its own repo info by adding repos/repoinfo.xml in its service folder. The service specific repo will be included in the list of repos defined for the stack.
<reposinfo> <os family="redhat6"> <repo> <baseurl>http://cust.service.lab.com/Services/centos6/1.1/myservices</baseurl> <repoid>CUSTOM-1.1</repoid> <reponame>CUSTOM</reponame> </repo> </os> </reposinfo>