When enabling the “Block command line pushes that expose my email” feature, you’ll also want to configure Git to use your no-reply email address. Don’t worry—this won’t affect your contribution graph. All commits will still be associated with your account.
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Open Terminal.
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Change the current working directory to the local repository where you want to configure the email address that you associate with your Git commits.
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Find your GitHub noreply address in your GitHub’s Personal Settings → Emails. It’s mentioned in the description of the Keep my email address private checkbox. Usually, it starts with a unique identifier, plus your username.
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Set an email address in Git. Use your GitHub-provided no-reply email address.
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Setting your email address for every repository on your computer
git config --global user.email "{ID}+{username}@users.noreply.github.com"
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Setting your email address for a single repository
git config user.email "{ID}+{username}@users.noreply.github.com"
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Reset the author information on your last commit:
git commit --amend --reset-author
If you have multiple commits with your private e-mail address, see this answer.
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Now you can push the commit with the noreply e-mail address, and future commits will have the noreply e-mail address as well.
git push
Once you configure Git, commits will use your alternate “noreply” email address, and any pushes that don’t will be rejected.