bash_profile

# Autocomplete
if [ -f /usr/local/git/contrib/completion/git-completion.bash ]; then
    . /usr/local/git/contrib/completion/git-completion.bash
fi

# mostra se existem alterações no projeto (master/branch)
GIT_PS1_SHOWDIRTYSTATE=true

# necessário para o correto funcionamento da variável ‘__git_ps1’
source /usr/local/git/contrib/completion/git-prompt.sh

# utilizado para escrever o projeto corrente utilizado (master/branch)
PS1='\u@\h:\w $(__git_ps1 "(%s)")\$ '

# Setting GIT prompt
c_cyan=`tput setaf 6`
c_red=`tput setaf 1`
c_green=`tput setaf 2`
c_sgr0=`tput sgr0`

branch_color ()
{
    if git rev-parse --git-dir >/dev/null 2>&1
    then
        color=""
        if git diff --quiet 2>/dev/null >&2 
        then
            color=${c_green}
        else
            color=${c_red}
        fi
    else
        return 0
    fi
    echo -n $color
}

parse_git_branch ()
{
    if git rev-parse --git-dir >/dev/null 2>&1
    then
        gitver="["$(git branch 2>/dev/null| sed -n '/^\*/s/^\* //p')"]"
    else
        return 0
    fi
echo -e $gitver
}

#It's important to escape colors with \[ to indicate the length is 0
PS1='\u@\[${c_red}\]\W\[${c_sgr0}\]\[\[$(branch_color)\]$(parse_git_branch)\[${c_sgr0}\]$ '

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install git bash-completion
Add the following line to your ~/.bash_profile:
[[ -r "/usr/local/etc/profile.d/bash_completion.sh" ]] && . "/usr/local/etc/profile.d/bash_completion.sh"