how to make "git log" to grep diff

From: wuzhouhui <wuzhouhui14@mails.ucas.ac.cn>
Date: Jun 30, 2020, 01:27 UTC
Message-ID: <b15193cd-339a-1097-df9f-a3b587db3be3@mails.ucas.ac.cn>

Hi

The option --grep of git log is to grep commit log message, but I want to

grep diff, is any option support it?

Thanks

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