There is not such functionality in Sourcetree. This SO topic looks like it would address things if you're using Git: https://stackoverflow.com/questions/750172/change-the-author-and-committer-name-and-e-mail-of-multiple-commits-in-git
Senior Mac Developer, Sourcetree
Supported Platforms macOS Windows We recently introduced support for additional hosting services such as GitHub Enterprise, GitLab (Cloud, Community Edition, Enterprise Edition), and...
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