For capistrano 3 check https://github.com/ianheggie/capistrano-tagging3

For capistrano > 2 check https://github.com/dimko/capistrano-tagging

Automagically tag your current deployed release with capistrano

Install:

gem install capistrano-git-tags

usage: put this in the top in your deploy.rb:

require 'capistrano/git/tags'

• specify the formatting of the tag

• http://wendbaar.nl/blog/2010/04/automagically-tagging-releases-in-github/

• http://gist.github.com/381852