git: Allow to restrict branches able to view
Permit a user/group only to view/select a specific git-branch within a project's repository. This would enable the project manager to restrict external stakeholder for example to a release-branch and hide internal (unstable) development branches.
The branches availiable could be selected statically definined in the project settings, eg. "Limit branches to view: yes/no" "Type in the names of the branches, multiple allowed: stable extern"