Deleting a branch

[Pascal Schumacher]

Hi everybody,

pushed "pr/176" by mistake. How can I delete the branch? I tried:
incubator-groovy>git push origin --delete pr/176
remote: error: denying ref deletion for refs/heads/pr/176
To 
https://pascalschumac...@git-wip-us.apache.org/repos/asf/incubator-groovy.git
 ! [remote rejected] pr/176 (deletion prohibited)
error: failed to push some refs to 
'https://pascalschumac...@git-wip-us.apache.org/repos/asf/incubator-groovy.git'

Thanks,
Pascal