git: fix remote repo compare logic that wrongly used repos to fetch for cross fork review

vcsserver/remote/git_remote.py

@@ -812,14 +812,18 b' class GitRemote(RemoteBase):'
         return repo.get_description()
 
     @reraise_safe_exceptions
-    def get_missing_revs(self, wire, rev1, rev2, path2):
+    def get_missing_revs(self, wire, rev1, rev2, other_repo_path):
+        origin_repo_path = wire['path']
         repo = self._factory.repo(wire)
-        LocalGitClient(thin_packs=False).fetch(path2, repo)
+        # fetch from other_repo_path to our origin repo
+        LocalGitClient(thin_packs=False).fetch(other_repo_path, repo)
 
         wire_remote = wire.copy()
-        wire_remote['path'] = path2
+        wire_remote['path'] = other_repo_path
         repo_remote = self._factory.repo(wire_remote)
-        LocalGitClient(thin_packs=False).fetch(path2, repo_remote)
+
+        # fetch from origin_repo_path to our remote repo
+        LocalGitClient(thin_packs=False).fetch(origin_repo_path, repo_remote)
 
         revs = [
             x.commit.id