Twgit is a free and open source assisting tools for managing features, hotfixes and releases on Git repositories. It provides simple, high-level commands to adopt the branching model describes in our documentation. Supported OS: Debian/Ubuntu Linux, Mac OS X 10.8 (Mountain Lion) or lower.
An idea from @aluput was to configure and send an email when closing a release / hotfix.
This email would list all the features merged in the release and display all comments for every commits in those feature.
I let this feature to discussion, but it will certainly based on a user/project specific configuration like the use of a .twgit with new options.