diff --git a/oneliners/git-reauthor-branch b/oneliners/git-reauthor-branch
new file mode 100644
index 0000000..08f9c73
--- /dev/null
+++ b/oneliners/git-reauthor-branch
@@ -0,0 +1,4 @@
+# Change the author and committer of every commit on a branch.
+# Any mismatching committer dates will be adjusted to match the
+# commit's author date.
+EDITOR=true git rebase --committer-date-is-author-date -i --root "$(git rev-parse --abbrev-ref HEAD)" -x 'GIT_COMMITTER_DATE="$(git show -s --format=%ci)" git commit --amend --author "John Doe <john@example.org>" -CHEAD'