###OSX configure git auto completeion
open terminal
cd ~
hit return(make sure you are in the home dir) then paste in
curl -OL https://github.com/git/git/raw/master/contrib/completion/git-completion.bash
hit return
Now you should still be your home dir, if not cd ~ again;
then rename the git-completion.bash make it hidden as follow:
mv ~/git-completion.bash ~/.git-completion.bash
then using vi,nano or whatever you like to make some change to our .bash_profile file:
vi .bash_profile
then paste in
if [ -f ~/.git-completion.bash ]; then source ~/.git-completion.bash fi
then CTRL+X -> Y -> RETURN.