We are not: https://www.python.org/dev/peps/pep-0440/ (only for release builds, but not the dev packages).

Among other issues, it does not seem to allow including git commit hashes (not sure we have those in released packages, or only local builds)? See maybe https://stackoverflow.com/questions/35522047/pep440-compliant-and-git-describe-info-available-from-deployed-package