git merge --no-ff code example

Example 1: git revert merge

git revert -m 1 <merge-commit>

Example 2: git revert pr merge

git revert -m 1 b76a5f1f5d3b323679e466a1a1d5f93c8828b269 (Commit Number)

Example 3: git merge tag to branch and squash commits

git checkout master
git merge --squash tag
git commit