magicmonty/bash-git-prompt — pull request #25 by danil (2013-10-01 14:11:08+00:00)
Title: Added callback function to tweak prompt dynamicly

Thank you for the good work.
I lack the ability to dynamically change the prompt.
For example, I want to see the number of background jobs (jobs: 1)
But nothing will be shown if jobs number is zero.
For this purpose, I added callback function.