How to change the commit author for one specific c

Question

I want to change the author of one specific commit in the history. It's not the last commit.

I know about this question - How do I change the author of a commit in git?

But I am thinking about something, where I identify the commit by hash or short-hash.

Answer 1

Interactive rebase off of a point earlier in the history than the commit you need to modify (git rebase -i <earliercommit>). In the list of commits being rebased, change the text from pick to edit next to the hash of the one you want to modify. Then when git prompts you to change the commit, use this:

git commit --amend --author="Author Name <[e-mail]>"

---

For example, if your commit history is A-B-C-D-E-F with F as HEAD, and you want to change the author of C and D, then you would...

1. Specify git rebase -i B (here is an example of what you will see after executing the git rebase -i B command)
   • if you need to edit A, use git rebase -i --root
2. change the lines for both C and D from pick to edit
3. Once the rebase started, it would first pause at C
4. You would git commit --amend --author="Author Name <[e-mail]>"
5. Then git rebase --continue
6. It would pause again at D
7. Then you would git commit --amend --author="Author Name <[e-mail]>" again
8. git rebase --continue
9. The rebase would complete.
10. Use git push -f to update your origin with the updated commits.

Answer 2

Github documentation contains a script that replaces the committer info for all commits in a branch.

#!/bin/sh

git filter-branch --env-filter '

OLD_EMAIL="[e-mail]"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="[e-mail]"

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

Answer 3

Commit before:

To fix author for all commits you can apply command from @Amber's answer:

git commit --amend --author="Author Name <[e-mail]>"

Or to reuse your name and email you can just write:

git commit --amend --author=Eugen

Commit after the command:

For example to change all starting from 4025621:

You must run:

git rebase --onto 4025621 --exec "git commit --amend --author=Eugen" 4025621

Note: To include an author containing spaces such as a name and email address, the author must be surrounded by escaped quotes. For example:

git rebase --onto 4025621 --exec "git commit --amend --author=\"Foo Bar <[e-mail]>\"" 4025621

or add this alias into ~/.gitconfig:

[alias]
    reauthor = !bash -c 'git rebase --onto $1 --exec \"git commit --amend --author=$2\" $1' --

And then run:

git reauthor 4025621 Eugen