Creating image fedora-22 on thin... Note: checking out 'HEAD'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by performing another checkout. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -b with the checkout command again. Example: git checkout -b HEAD is now at 1772878... DBG M test/images/fedora-22 [detached HEAD ef62e0a] Image refresh for fedora-22 1 file changed, 1 insertion(+), 1 deletion(-) To https://CENSORED@github.com/cockpituous/cockpit.git + a6cf4fc...ef62e0a HEAD -> refresh-fedora-22-2016-02-02 (forced update) Traceback (most recent call last): File "sink", line 311, in push reporter.push(data) File "sink", line 159, in push result = self.req(token, method, resource, data) File "sink", line 137, in req response.status, response.reason, output.strip())) RuntimeError: Couldn't update GitHub: 422 Unprocessable Entity {"message":"Validation Failed","errors":[{"resource":"PullRequest","code":"missing_field","field":"head_sha"},{"resource":"PullRequest","code":"missing_field","field":"base_sha"},{"resource":"PullRequest","code":"custom","message":"No commits between master and cockpituousNone"}],"documentation_url":"https://developer.github.com/v3/pulls/#create-a-pull-request"}