Now it's time to explore another important concept about Git and its references, the detached HEAD state.
For the sake of the explanation, go back to the master branch and see what happens when we check out the previous commit, moving HEAD backward; perform a git checkout HEAD^:
[42] ~/grocery (master) $ git checkout HEAD^ Note: checking out 'HEAD^'.You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by performing another checkout. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -b with the checkout command again. Example: git checkout -b <new-branch-name> ...
