Interface VcsMappings

In settings.gradle:

 vcsMappings {
   withModule("group:name") {
     from vcs(GitVcs) {
         url = "..."
     }
   }
   addRule("rule for group") { details ->
       if (details.requested.group == "group") {
           from vcs(GitVcs) {
               url = "..."
           }
       }
   }
 }