Limiting Stash/Fisheye/Git/Bitbucket/Subversion per project

There is a situation where different projects uses different products for the source code integration. There could be Project1 to integrate with Stash, Project2 to integrate with Fisheye, and Project3 to integrate with Bitbucket.

When in this case, there is no way to configure Project1 to only allow Stash branch to be created. Users may mistakenly created branch on Bitbucket when they see there is a link to Bitbucket when clicking "Create branch" link.