Git branch name in your prompt

When you want to get something similar like

idea:~/my/project/hybris/order-service (develop) 

as your Bash prompt on a Mac or perhaps some other Unix OSs — where "(develop)" could be your currently checked out Git branch — add this

PS1='\h:\[\e[0;31m\]\w\[\e[m\]`__git_ps1` ' 

or 

PS1='\h:\[\e[0;31m\]\w\[\e[m\] \e[1;31m\]$(__git_ps1 %s)\e[m ' 

to your ~/.bash_profile

Alternatively you could use

PS1='`__git_ps1` '

just to see the branch name.