Jenkins Pluginを作成してみた。 ref: http://qiita.com/ukiuni@github/items/0e164ac69b4f3c9ac56a

config

Host github.com
  HostName github.com
  IdentityFile /Users/user/.ssh/github.key
  User XXXXX

pom.xml（抜粋）

<scm>
    <connection>scm:git:ssh://github.com/jenkinsci/XXXXXXXX.git</connection>
    <developerConnection>scm:git:ssh://git@github.com/jenkinsci/XXXXXXXX.git</developerConnection>
    <url>https://github.com/jenkinsci/XXXXXXXX.git</url>
  </scm>

setting.xml

<settings>
 ・・・
  <servers>
    <server>
      <id>maven.jenkins-ci.org</id>
      <username>XXXXXX</username>
      <password>XXXXXX</password>
    </server>
  </servers>

</settings>