git tag -l -n5

  git tag -l -n5 -sort=v:refname

  git checkout -b b0.1.1 v0.1.1

  Switched to a new branch 'b0.1.1'

  git branch 

 * b0.1.1   <-- * 表示当前分支
   master

  git checkout -b b0.1.1 v0.1.1

  fatal: A branch named 'b0.1.1' already exists.

  git checkout b0.1.1 

  git checkout -b b0.1.2 v0.1.2

error: Your local changes to the following files would be overwritten by checkout:
	README.md
Please commit your changes or stash them before you switch branches.
Aborting
  

  git stash

  git checkout -b b0.1.2 v0.1.2