Better way to get last commit ID

Issue #511
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/vcs.py

@@ -528,7 +528,7 @@ class HgRepository(Repository):
     """
     _cmd = 'hg'
     _cmd_last_revision = [
-        'id', '--id'
+        'log', '--limit', '1', '--template', '{node}'
     ]
     _cmd_last_remote_revision = [
         'log', 'TODO'