gistfile1.md

Returns all of your branches, sorted by most recent activity:

git for-each-ref --count=30 --sort=-committerdate refs/heads/ --format='%(refname:short)'

from: http://stackoverflow.com/questions/5188320/how-can-i-get-a-list-of-git-branches-ordered-by-most-recent-commit

And yes, definitely make an alias