Server!/Horror! I have a magnet and I don't mind using it!

Git Magic (git filter-branch)

Rewrite all commits in git to a new author:

git filter-branch -f --env-filter '\
    GIT_AUTHOR_EMAIL=author@example.invalid; \
    export GIT_AUTHOR_EMAIL; \
    GIT_AUTHOR_NAME="New Author"; \
    export GIT_AUTHOR_NAME'

Generated: 2017-11-02 10:20:47 +0100