dko.py

from dulwich import client
import paramiko
class ParamikoWrapper(object):
    def __init__(self, host, command, username, port):
        self.client = paramiko.SSHClient()
        self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        self.client.connect(host, username=username)
        self.streams = self.client.exec_command(command[0])
        self.write = self.streams[0].writelines
        self.read = self.streams[1].readline

    def can_read(self):
        return len(select.select([self.streams[1].channel.fileno()], [], [], 0)) > 0

    def close(self):
        self.client.close()

class ParamikoSSHVendor(object):
    def connect_ssh(self, host, command, username=None, port=None):
        return ParamikoWrapper(host, command, username, port)

client.get_ssh_vendor = ParamikoSSHVendor

example.py

import dulwich
import dko
import os

client = dulwich.client.SSHGitClient('github.com', 22, 'git')
repo = dulwich.repo.Repo(os.path.realpath('.'))

# put a repo you have private access to HERE
print client.fetch('chrisdickinson/wilson.git', repo)