title: How to change the Tagger name and email of a Git Tag
body: <p>Long story short I'm writing a script to migrate a very large project from (gasp) Microsoft SourceSafe to Git and I'm trying to retain the authors of the SourceSafe project's labels(which are essentially tags in Git). I know you can modify the author and committer name/date of a Git Commit but can you do the same to a Git Tag?</p>