Create a flat list of commits to do from the tree

Walk the node tree and record the parents, then reverse the tree so we
can have the exact order in which to create git commits

lib/db_revision.py

@@ -25,7 +25,7 @@ class DBRevision:
         self._files = None
 
     def short_string(self):
-        return f"Rev {self.project}/{self.package}/{self.rev}"
+        return f"{self.project}/{self.package}/{self.rev}"
 
     def __str__(self):
         return f"Rev {self.project}/{self.package}/{self.rev} Md5 {self.unexpanded_srcmd5} {self.commit_time} {self.userid} {self.request_number}"