Git: reset author for ALL commits

git-reset-author.sh

#!/bin/sh

# Credits: http://stackoverflow.com/a/750191

git filter-branch -f --env-filter "
    GIT_AUTHOR_NAME='Newname'
    GIT_AUTHOR_EMAIL='new@email'
    GIT_COMMITTER_NAME='Newname'
    GIT_COMMITTER_EMAIL='new@email'
  " HEAD

Thanks you very much)

Thank you bro : )

Thank you!

@bgromov , Newname is our github id or actual name?

Thanks!

Nice! This even keeps old timestamps!
To push to a remote afterwards, a --force is needed.

git push --force --tags origin 'refs/heads/main'
# or
git push --force

Credits to the comments of https://stackoverflow.com/a/750191/8940679

Thank you so much! This really helps when you change from a personal handle to a business one.

Thank you so much!

Thank you

Thanks! I get this warning though.

WARNING: git-filter-branch has a glut of gotchas generating mangled history
         rewrites.  Hit Ctrl-C before proceeding to abort, then use an
         alternative filtering tool such as 'git filter-repo'
         (https://github.com/newren/git-filter-repo/) instead.  See the
         filter-branch manual page for more details; to squelch this warning,
         set FILTER_BRANCH_SQUELCH_WARNING=1.
Proceeding with filter-branch...

Rewrite 2a51e47ec68d9fb91xxxxxxxx (2/2) (0 seconds passed, remaining 0 predicted)    
WARNING: Ref 'refs/heads/main' is unchanged

Can you suggest something?

Thanks, works brillant.

Thanks :)

Thanks :)

thanks

Thanks a lot!

Thanks. To update only your commits and not all ( even if not yours):

#!/bin/sh

git filter-branch -f --env-filter '
OLD_EMAIL="xxxxxxxxxxxxxxxxxxxxxxxxxx"
CORRECT_NAME="zzzzzzzzzzzzzzzzz"
CORRECT_EMAIL="yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy"
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
'  HEAD

Thank you so much!

Thank you very much

Awesome! Thank you

Thanks a lot.

Thanks

Thank you a lot!

@bgromov , Newname is our github id or actual name?

both will work.

@biniama

git filter-repo solution:

git filter-repo --preserve-commit-hashes --name-callback "$(cat <<'EOF'
return b'<replace everything between the quotes with your name>'
EOF
)" --email-callback "$(cat <<'EOF'
return b'<replace everything between the quotes with your email>'
EOF
)"

If you had signed your commits before this, note that the above command will remove those signatures. For me, this answer was useful to resign all commits without loosing commit dates.