Environment values passed to Repo.clone_from() are not kept in the resulting repo

[bpiotr]

r = Repo.clone_from("git@github.com:bpiotr/whatever_repo.git", "/tmp/repo", env={"key": "value"})
r.git.environment()
{}

This is not what I expected when I called Repo.clone_from and documentation does not elaborate on the transient nature of the env here so IMHO this is a bug.

BTW it costed me quite a while to figure out that clone_from actually uses env but any subsequent operations on the result needs it to have it set again.