git add tag to last commit code example

Example 1: add changes to last commit

git add the_left_out_file
git commit --amend --no-edit

Example 2: git add tag

git tag -a v1.2 
git push origin v1.2

Example 3: create a tag from a commit/branch

git tag -a version.number -m "Tag Message"
git push origin <tagname>

Example 4: git tag a previous commit

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

Example 5: git tag from commit

$ git tag <tag_name> HEAD   (for the last commit)