基本常用指令:
git checkout [commit id #C] : 把HEAD切到[#C]這筆commit
git checkout [branch name #A] : 切換到[#A]這個branch
git revert [commit id #C] : revert [#C] 這筆commit
git checkout [commit id #C] : 把HEAD切到[#C]這筆commit
git checkout [branch name #A] : 切換到[#A]這個branch
git revert [commit id #C] : revert [#C] 這筆commit
