Log Message:
py-hg-git: update to 1.0.2.

This is a minor release, focusing on bugs and compatibility.

Fix --source/-s argument to transplant with Hg-Git
enabled. (#392)
Fix cloning repositories using the old static HTTP support with
Hg-Git enabled.
Handle pushing tags to Git that cannot be stored as references such
as double-quotes on Windows. (#397)
Avoid converting unrelated refs on pull, such as Github PR-related refs. (#386)
Fix tests with GNU Grep 3.8 and later, by avoiding the egrep
alias (#400)
Support reading remote refs even if packed.
Add support for Dulwich 0.21 and later.
Mark Mercurial 6.4 as supported and tested.
Address slowness when pulling large repositories, caused by writing
unchanged references. (#401)