The author no longer uses Redmine and cannot effectively update and maintain this repo.
The Redmine Revision Branches add branch information to the revision detail screen for a specific checkin. This is primarily useful when using something like git where a particular checkin will be merged into another branch.
$ cd redmine/plugins
$ git clone https://github.com/tleish/redmine_revision_branches
restart Redmine
Go to Plugin > Revision Branches > Configure to enable/disable parts of the application.