org.eclipse.juno.tools/runManuallyRarely/updateCommonComposite.xml

<project
    default="createcomposite"
    basedir=".">
    <target
        name="createcomposite">
        <p2.composite.repository>
            <repository
                location="file:/home/data/httpd/download.eclipse.org/releases/juno/"
                name="Eclipse Juno Repository"/>
            <add> 
                <repository location='201106220900'/>
            </add>
            <remove>
                <repository location='201105200900'/>
                <repository location='201105270900'/>
                <repository location='201106030900'/>
            </remove>
        </p2.composite.repository>
    </target>
</project>