GIT + .bash_profile" (ou ".bashrc")

.bashrc

# Fonte: http://vidageek.net/2009/07/20/como-exibir-branch-atual-do-git/

export PS1="\[\033[38m\]\u\[\033[32m\] \w \[\033[31m\]\`git \\
branch 2>/dev/null | grep \"^\*\" | \\
sed -r \"s/\*\ (.*)/ \(\1\)/\"\`\[\033[37m\]$\[\033[00m\] "

## Mac version:
#
#PS1="\[\033[38m\]\u";
#PS1="$PS1\[\033[32m\] \w";
#PS1="$PS1\[\033[31m\]";
#PS1="$PS1\`git branch 2>/dev/null | grep \"^\*\" | \\
#                             sed 's/\*\ \(.*\)/ (\1)/'\`"
#export PS1="$PS1\[\033[37m\]$\[\033[00m\]";