Add a new tag and push it
git tag new_tag old_tag
git push --tags
Then delete the old tag from remote and local
git push origin :refs/tags/old_tag
git tag -d old_tag
Add a new tag and push it
git tag new_tag old_tag
git push --tags
Then delete the old tag from remote and local
git push origin :refs/tags/old_tag
git tag -d old_tag