新建hook文件

# cat .git/hooks/pre-commit

##!/bin/sh
for FILE in `git diff --cached --name-only --diff-filter=ACM`;do
    echo $FILE
    sed -i '' -E 's/(key1|key2)/coder4/' $FILE 
    git add $FILE
done

添加执行权限

chmod a+x .git/hooks/pre-commit

之后，在commit后，会自动替换字符串