{{tag>git}}

====== Change git author and email in history retroactively ======
<WRAP center round alert 60%>
Before executing the script, set your user.name and user.email git config parameter properly!
</WRAP>

<WRAP center round important 60%>
This changes SHA1s, so take care when using it on a branch that has already been pushed.
</WRAP>

===== First stash any unstaged changes =====

  git stash

===== Apply fix =====
Set variables on lines 2,3 and 4 below and run:

<code bash [enable_line_numbers="true"]>
git filter-branch --env-filter '
OLD_EMAIL="your-old-email@example.com"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="your-correct-email@example.com"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_COMMITTER_NAME="$CORRECT_NAME"
    export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
fi
if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_AUTHOR_NAME="$CORRECT_NAME"
    export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags
</code>

===== Delete duplicate backup history =====

  git update-ref -d refs/original/refs/heads/master
  rm -rf .git/refs/original/

===== Verify the new rewritten log via =====


  git log --pretty=format:"[%h] %cd - Committer: %cn (%ce), Author: %an (%ae)"

====== Tested on ======
  * 

====== See also ======

====== References ======
  * https://stackoverflow.com/questions/750172/how-to-change-the-author-and-committer-name-and-e-mail-of-multiple-commits-in-gi