You should probably migrate to GitHub Branch Source Plugin

This plugin builds pull requests in github and report results.

{jenkins-plugin-info:ghprb|jiraComponent=ghprb-plugin}

More up to date information is available on the:
Github README.md

Commands: 

When a new pull request is opened in the project and the author of the pull request isn't white-listed, builder will ask "Can one of the admins verify this patch?".

If the build fails for other various reasons you can rebuild.

Installation:

Credentials

Creating job:

If you want to manually build the job, in the job setting check "This build is parameterized" and add string parameter named "sha1". When starting build give the "sha1" parameter commit id you want to build or refname (eg: "origin/pr/9/head").

Environment Variables

The plugin makes some very useful environment variables available.

Job DSL Support

The plugin contains an extension for the Job DSL plugin to add DSL syntax for configuring the build trigger and the pull request merger post-build action.

Here is an example showing all DSL syntax elements:

job('example') {
    scm {
        git {
            remote {
                github('test-owner/test-project')
                refspec('+refs/pull/*:refs/remotes/origin/pr/*')
            }
            branch('${sha1}')
        }
    }
    triggers {
        githubPullRequest {
            admin('user_1')
            admins(['user_2', 'user_3'])
            userWhitelist('you@you.com')
            userWhitelist(['me@me.com', 'they@they.com'])
            orgWhitelist('my_github_org')
            orgWhitelist(['your_github_org', 'another_org'])
            cron('H/5 * * * *')
            triggerPhrase('OK to test')
            onlyTriggerPhrase()
            useGitHubHooks()
            permitAll()
            autoCloseFailedPullRequests()
            allowMembersOfWhitelistedOrgsAsAdmin()
            extensions {
                commitStatus {
                    context('deploy to staging site')
                    triggeredStatus('starting deployment to staging site...')
                    startedStatus('deploying to staging site...')
                    statusUrl('http://mystatussite.com/prs')
                    completedStatus('SUCCESS', 'All is well')
                    completedStatus('FAILURE', 'Something went wrong. Investigate!')
                    completedStatus('PENDING', 'still in progress...')
                    completedStatus('ERROR', 'Something went really wrong. Investigate!')
                }
            }
        }
    }
}

See the README on GitHub for the latest information.

Changelog

>= 1.25

Changelog for 1.25 and upward is maintained on the plugins github page

1.24

Use signature checking for webhooks if desired.
Add custom messages to status updates and a custom url field.

1.23

Use credentials plugin for username/password combinations and tokens.
Support multiple GitHub endpoints.

1.22.x

Fix issue where if a project was disabled the Jenkins Trigger process would crash
Fix commit status context
Add one line test results for downstream builds
Miscellaneous bug fixes

1.22

Move commit status over to extension form. It is now configurable, satisfying #81, #73, and #19 at least.

1.21

Move all commenting logic out into extensions.

1.20.1

Null Pointer fix for trigger.
Added clarity to error message when access is forbidden.

1.20

PullRequestMerger now notifies the taskListener of failures.
AutoCloseFailedPullRequest has been extracted from the published URL check.

1.19

More work for disabled builds.
Unified tabs to spaces.
Updates to the tests, and added some tests.

1.18

Add support for folder projects.
Correcting issue with default credentials.
Correcting issue with ghRepository being null when it shouldn't be.
Ignoring case when matching repo to url.
Changing the wording for pull requests that are mergeable.
Change requestForTesting phrase to a textArea.
Check if project is disabled, if it is then don't do anything.

1.14

A comment file can be created during the build and added to any comment made to the pull request. podarok#33
Added a [skip ci] setting, that can be changed. Adding the skip statement to the pull request body will cause the job not to run. sathiya-mit#29
Escaping single quotes in log statements tIGO#38
Fixed owner name deduction from url on github hook handling nikicat#40
Removed unused Test field from the config

1.13-1

Replacing deprecated Github.connect method. tIGO#39
Added a merge plugin for post build. If the build is successful, the job can specify conditions under which the pull request "button" will be pressed.

1.12

Fixes issue with checking rate limits for GitHub Enterprise
Internal refactorings
Fixes checking of TriggerTimer (JENKINS-22550)

1.11.2

Major reduction in the number of requests made to GitHub to avoid rate limit issues
Fixed changelog for a build so it reports differences between Pull Request build
Fixes bug on getting author email address from GitHub APIs
Updates warning message is URL isn't set on the GitHub project plugin
Adds some additional parameters to the build, such as the source branch, pull request link, etc.
Success/failure message now put into the comment on Pull Requests

1.10 - 1.11.1

Not publicly released.

1.9

Added job specific triggers.
Added more informations as job parameters.
Fix support for gh-ent token generation. JENKINS-17334
Lookup PR detailed information for each PR. JENKINS-17852
Fix closing PR.
various bugfixes

1.8

Support auto-close at build level
add pull id and target branch to environment variables
fix GitHub Hooks when authentication is required on Jenkins
various bug fixes and improvements

1.7

implemented support for GitHub hooks
added button for generating API token

1.6

option for specifying how to mark unstable builds in GitHub
Close failed pull requests automatically if plugin admin configured it
customizeable pass/fail comments
Refactoring of code
help description in Jenkins configuration

1.5

checkbox enabling sending comments when update of comment status fails
option to enter organisations which members are whitelisted
support for Enterprise GitHub
link to pull request into build description
fixes

1.4

Changed comment commands - phrases for testing once, pull request or add user to whitelist
"test this please" starts new build
"ok to test" allow pull request for building
"add to whitelist" add user to whitelist

1.3

Add published URL feature.
Enable connection to GitHub Enterprise instances.
Enable authentication via a token.
When automatic merge is possible, build the merge.

1.2

Use commit status API instead of comments for reporting results.