After reinstalling the system a few days ago, I accidentally committed a lot of commits with author "root"<root@localhost> and looked for a way to modify them.

Create a new shell script called fix.sh in the repository root directory and type the following.

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#!/bin/bash

git filter-branch --env-filter '
an="$GIT_AUTHOR_NAME"
am="$GIT_AUTHOR_EMAIL"
cn="$GIT_COMMITTER_NAME"
cm="$GIT_COMMITTER_EMAIL"

if [ "$GIT_COMMITTER_EMAIL" = "Wrong email" ]
then
    cn="Correct name"
    cm="Correct email"
fi
if [ "$GIT_AUTHOR_EMAIL" = "Wrong email" ]
then
    an="Correct name"
    am="Correct email"
fi

export GIT_AUTHOR_NAME="$an"
export GIT_AUTHOR_EMAIL="$am"
export GIT_COMMITTER_NAME="$cn"
export GIT_COMMITTER_EMAIL="$cm"
'

When finished, run . /fix.sh and you’re done.