how to switch to a tag in git code example

Example 1: git tag checkout

$ git checkout tags/v1.0 -b v1.0-branch

Switched to a new branch 'v1.0-branch'

Example 2: git see tags

$ git tag -l -n2

Example 3: git tag a previous commit

git tag -a v1.2 9fceb02 -m "Message here"