0.Clone from remote repo $git clone [- b dev ] https : //git.coding.net/StevenZack/ui.git --depth 1 $git push origin dev $git remote add https : //git.coding.net/StevenZack/ui.git $git push origin + master //intigrate git fetch origin master 1.cd into your work dir $git init $git add * $git commit -m "1.original version" 2.do what you like in your work dir ( make some change or make a new file /delete a file ....ect anything ....) ===check what file did you changed: $git status ===check detail that you changed: $git diff ===make a snapshot $ git add * $ git commit -m "2.added a mainwindow , and make some changes" ===upload to origin source $git push -u origin master 3.Return to exact version ===return to past $git log -- pretty = oneline $git reset -- hard 313f934 ===return to future $ git reflog $git reset -- hard 313f934