Earlier quoted context omitted.
I mean, the other alternative is just keep your prompt simple. ;-)
This. The one time a month when I can't remember which git branch I'm on I'll just run 'git branch'. If you're feeling frisky, you could even alias that to 'gb'.
oh-my-zsh does this by default as it comes with the "git" plugin loaded. "gb -vv" is a common thing I run.