How to Fix Wrong Git Commit Email Without Re‑committing

Modify the most recent commit's email

git commit --amend --author="NewAuthor <[email protected]>"

Batch modify email

Use the following script, replace the placeholders with your old and new information, then run it in the Git repository.

#!/bin/sh

git filter-branch --env-filter '
    an="$GIT_AUTHOR_NAME"
    am="$GIT_AUTHOR_EMAIL"
    cn="$GIT_COMMITTER_NAME"
    cm="$GIT_COMMITTER_EMAIL"

    if [ "$GIT_COMMITTER_EMAIL" = "[Your Old Email]" ]
    then
        cn="[Your New Author Name]"
        cm="[Your New Email]"
    fi
    if [ "$GIT_AUTHOR_EMAIL" = "[Your Old Email]" ]
    then
        an="[Your New Author Name]"
        am="[Your New Email]"
    fi

    export GIT_AUTHOR_NAME="$an"
    export GIT_AUTHOR_EMAIL="$am"
    export GIT_COMMITTER_NAME="$cn"
    export GIT_COMMITTER_EMAIL="$cm"
'

Q&A

A previous backup already exists in refs/original/

This message indicates a prior git filter-branch created a backup under refs/original/. Delete the backup with one of the following commands:

git update-ref -d refs/original/refs/heads/master
# or
git filter-branch -f --tree-filter 'rm -f test' -- --all

References

git modify commit author and email

git modify historical commit username and email