Update Commit Author & Signing for a whole repo

ReauthorAndSignAllCommits.txt

# Ever foul up your git history?  Yeah, me neither. 😁  But on the off chance you, say,
# committed using the wrong git account, which didn't have signing enabled, you could...
# in theory...do something like the steps below.
#
# Note: This was done on a repo where I was the only contributor,
# and I was ok rewriting history for EVERY COMMIT.
# Please understand each of these commands before you run them, and use at your own risk.

# Rebase all commits, replacing author:
git filter-repo --commit-callback '
commit.gpgsig = None
commit.author_email = b"my@email.com"
commit.author_name = b"Joe Schrag"
commit.committer_date = commit.author_date
'

# Re-sign the commits
git rebase --committer-date-is-author-date --rebase-merges --root -S

# Check that committer & author timestamps match
git log --pretty=format:'%h %an <%ae> author:%ad committer:%cd %s' --date=iso

git remote -v
# If that returns empty,
git remote add origin git@github.com...


git fetch
git push --force-with-lease origin main