I believe GitHub has a reasonable privacy policy.- GitHub Privacy Statement (docs.github.com)
Thanks for entrusting GitHub, Inc. or GitHub B.V. (“GitHub”, “we”, “us” or “our”) with your source code, your projects, and your personal data. This Privacy Statement explains our practices regarding the collection, use, and disclosure of your data, including any personal data we collect and process in connection with our website and any applications, software, products, and services provided by GitHub, including any Beta Previews (collectively, the “Service(s)”).