add git-exercise.txt in /git repository
add git-exercise.txt in /git repository

rossbar/berkeley,rossbar/berkeley,katyhuff/berkeley,thehackerwithin/berkeley,rossbar/berkeley,rossbar/berkeley,katyhuff/berkeley,katyhuff/berkeley,rossbar/berkeley,katyhuff/berkeley,thehackerwithin/berkeley,rossbar/berkeley,thehackerwithin/berkeley,thehackerwithin/berkeley,thehackerwithin/berkeley,katyhuff/berkeley,katyhuff/berkeley,thehackerwithin/berkeley