diff --git a/vcsserver/remote/git_remote.py b/vcsserver/remote/git_remote.py
--- a/vcsserver/remote/git_remote.py
+++ b/vcsserver/remote/git_remote.py
@@ -461,10 +461,18 @@ class GitRemote(RemoteBase):
         url_obj = url_parser(safe_bytes(url))
         authinfo = url_obj.authinfo()[1]
 
+        def _convert_to_strings(data):
+            if isinstance(data, bytes):
+                return safe_str(data)
+            elif isinstance(data, tuple):
+                return tuple(_convert_to_strings(item) for item in data)
+            else:
+                return data
+
         if authinfo:
             # create a password manager
             passmgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
-            passmgr.add_password(*authinfo)
+            passmgr.add_password(*_convert_to_strings(authinfo))
 
             handlers.extend((httpbasicauthhandler(passmgr),
                              httpdigestauthhandler(passmgr)))
@@ -483,7 +491,7 @@ class GitRemote(RemoteBase):
         if not test_uri.endswith('info/refs'):
             test_uri = test_uri.rstrip('/') + '/info/refs'
 
-        o = self._build_opener(test_uri)
+        o = self._build_opener(url=url)
         o.addheaders = [('User-Agent', 'git/1.7.8.0')]  # fake some git
 
         q = {"service": 'git-upload-pack'}
@@ -821,7 +829,7 @@ class GitRemote(RemoteBase):
         return remote_refs
 
     @reraise_safe_exceptions
-    def sync_push(self, wire, url, refs=None):
+    def sync_push(self, wire, url, refs=None, **kwargs):
         if not self.check_url(url, wire):
             return
         config = self._wire_to_config(wire)
@@ -830,6 +838,12 @@ class GitRemote(RemoteBase):
             wire, ['push', url, '--mirror'], fail_on_stderr=False,
             _copts=self._remote_conf(config),
             extra_env={'GIT_TERMINAL_PROMPT': '0'})
+        if kwargs.get('sync_large_objects'):
+            self.run_git_command(
+                wire, ['lfs', 'push', url, '--all'],
+                fail_on_stderr=False,
+                _copts=self._remote_conf(config),
+            )
 
     @reraise_safe_exceptions
     def get_remote_refs(self, wire, url):