Is there a reason .mailmap doesn't work in your case? https://git-scm.com/docs/gitmailmap https://git-scm.com/docs/gitmailmap >If the file .mailmap exists at

Is there a reason .mailmap doesn't work in your case? https://git-scm.com/docs/gitmailmap https://git-scm.com/docs/gitmailmap >If the file .mailmap exists at the toplevel of the repository, or at the location pointed to by the mailmap.file or mailmap.blob configuration options (see git-config[1]), it is used to map author and committer names and email addresses to canonical real names and email addresses.