in here there are copies of the Lib/ directory of the CPython HG repository
at http://hg.python.org/cpython/

2.7 is using Gentoo fork of CPython 2.7 git repository with additional
security fixes at https://gitweb.gentoo.org/fork/cpython.git

the outputs for hg id or `git describe HEAD` of each are:

    2.7::
        v2.7.18-3-g138e2caeb4
    3::
        cef745775b65 (3.2) v3.2.5