chore(git): change author for multiple commits

knowledge base/git.md

@@ -27,8 +27,9 @@
 1. [Remove a file from the repository](#remove-a-file-from-the-repository)
 1. [Troubleshooting](#troubleshooting)
     1. [Debug](#debug)
-    1. [GPG cannot sign a commit](#gpg-cannot-sign-a-commit)
+    1. [Change author information for multiple commits](#change-author-information-for-multiple-commits)
     1. [Git does not accept self-signed certificates](#git-does-not-accept-self-signed-certificates)
+    1. [GPG cannot sign a commit](#gpg-cannot-sign-a-commit)
 1. [Further readings](#further-readings)
     1. [Sources](#sources)
 
@@ -716,7 +717,7 @@ git branch --delete --remotes 'feat-branch'
 
 ### Delete branches which have been merged or are otherwise absent from a remote
 
-Command source [here][prune local tracking branches that do not exist on remote anymore].
+Command source: [prune local tracking branches that do not exist on remote anymore].
 
 ```sh
 # Branches merged on the remote are tagged as 'gone' in `git branch -vv`'s output.
@@ -967,6 +968,44 @@ When everything else fails, enable tracing:
 export GIT_TRACE=1
 ```
 
+### Change author information for multiple commits
+
+Useful when using the wrong email (e.g., the personal one instead of the work one) for a number of commits.
+
+Refer [How do I change the author and committer name/email for multiple commits?].
+
+1. Fix the author's information in the git config file.
+1. Rebase commits and execute the reset author command like this:
+
+   ```sh
+   git rebase --interactive --rebase-merges --exec 'git commit --amend --reset-author --no-edit' 'last-good-commit-hash'
+   ```
+
+The rebase will create a todo list that looks similar to this:
+
+```plaintext
+pick ef11092  # Blah blah blah
+exec git commit --amend --reset-author --no-edit
+pick 52d6391  # Blah bloh bloo
+exec git commit --amend --reset-author --no-edit
+pick 30ebbfe  # Blah bluh bleh
+exec git commit --amend --reset-author --no-edit
+…
+```
+
+Accepting it will rebase and apply the author reset to each commit automatically.
+
+As per normal rebase action, the timestamp of each commit will be updated.
+
+### Git does not accept self-signed certificates
+
+Disable certificate verification:
+
+```sh
+GIT_SSL_NO_VERIFY=true git …
+git -c http.sslVerify=false …
+```
+
 ### GPG cannot sign a commit
 
 > ```sh
@@ -981,15 +1020,6 @@ If `gnupg2` and `gpg-agent` 2.x are used, be sure to set the environment variabl
 export GPG_TTY=$(tty)
 ```
 
-### Git does not accept self-signed certificates
-
-Disable certificate verification:
-
-```sh
-export GIT_SSL_NO_VERIFY=true
-git -c http.sslVerify=false …
-```
-
 ## Further readings
 
 - Git [docs]
@@ -1070,6 +1100,7 @@ git -c http.sslVerify=false …
 [git submodules: adding, using, removing, updating]: https://chrisjean.com/git-submodules-adding-using-removing-and-updating/
 [git-extras]: https://github.com/tj/git-extras/
 [gpg failed to sign the data fatal: failed to write commit object]: https://stackoverflow.com/questions/39494631/gpg-failed-to-sign-the-data-fatal-failed-to-write-commit-object-git-2-10-0
+[How do I change the author and committer name/email for multiple commits?]: https://stackoverflow.com/questions/750172/how-do-i-change-the-author-and-committer-name-email-for-multiple-commits#1320317
 [how do i check out a remote git branch]: https://stackoverflow.com/questions/1783405/how-do-i-check-out-a-remote-git-branch/#1787014
 [how to add and update git submodules]: https://devconnected.com/how-to-add-and-update-git-submodules/
 [how to change a git remote]: https://careerkarma.com/blog/git-change-remote/

snippets/git.sh

@@ -42,6 +42,20 @@ git clean -df
 # Get the top-level directory of the current repository.
 git rev-parse --show-toplevel
 
+# create patches from the last commit
+git format-patch -n HEAD^
+git format-patch HEAD^ -o './patchDir'
+git format-patch HEAD~1 --stdout
+
+# create patches from specific commits
+git format-patch -1 '3918a1d036e74d47a5c830e4bbabba6f507162b1'
+
+# apply patches
+git apply 'patchDir/patchFile.patch'
+
+# Change author information for multiple commits.
+git rebase --interactive --rebase-merges --exec 'git commit --amend --reset-author --no-edit' '3918a1d0'
+
 
 ##
 # Remove files from the latest commit.
@@ -75,17 +89,6 @@ git symbolic-ref 'refs/remotes/origin/HEAD' 'refs/remotes/origin/main'
 # delete the master branch on the remote
 git push origin --delete 'master'
 
-# create patches from the last commit
-git format-patch -n HEAD^
-git format-patch HEAD^ -o './patchDir'
-git format-patch HEAD~1 --stdout
-
-# create patches from specific commits
-git format-patch -1 '3918a1d036e74d47a5c830e4bbabba6f507162b1'
-
-# apply patches
-git apply 'patchDir/patchFile.patch'
-
 ###
 # Take actions on multiple repositories
 # --------------------------------------