Place the script on /usr/local/bin/git to change the name and email before executing the git command

git

#!/usr/bin/env bash

GIT_SCRIPT=$(which -a git | sed -n 2p)

# Does the remote "origin" point to GitHub?
if ("$GIT_SCRIPT" remote -v 2>/dev/null |
    grep '^origin\b.*github.com.*(push)$' >/dev/null 2>&1); then

    # Yes.  Set username and email that you use on GitHub.
    export GIT_AUTHOR_NAME='*** username ***'
    export GIT_AUTHOR_EMAIL='*** email ***'
fi


# Does the remote "origin" point to BitBucket?
if ("$GIT_SCRIPT" remote -v 2>/dev/null |
    grep '^origin\b.*bitbucket.org.*(push)$' >/dev/null 2>&1); then

    # Yes.  Set username and email that you use on Bitbucket.
    export GIT_AUTHOR_NAME='*** username ***'
    export GIT_AUTHOR_EMAIL='*** email ***'
fi

"$GIT_SCRIPT" "$@"