How to move to another branch and put aside working changes without losing it in Git?

[BensonLiao]

1. First, of course you can actually push changes to the remote and do git reset/revert/rebase or just change code onward.
2. Using git stash to keep a stash of your working changes, a restore from it.
   There's some major situation when create and restore from stashes:
   note. in fact git can store more than 1 stash, git stash list will tell you the stashes you created
   note. so the following restore command are short-hand for the last stash you created, if you want to specify other stash, check doc

• create stash to record only modified files
  git stash
• create stash to record modified files include un-tracking files
  git stash -u
• restore only un-staged changes
  git stash apply
• restore only staged and un-staged changes (when you run git add <files_or_dirs>, those files or dirs will staged)
  git stash apply --index