restirc/etc/ivy/ivysettings.xml

<ivysettings>
    <settings defaultResolver="default"/>
    <resolvers>
        <ibiblio name="default" m2compatible="true"/>

        <ibiblio name="jgit" root="http://download.eclipse.org/jgit/maven" m2compatible="true"/>

        <ibiblio name="sonatype" root="https://oss.sonatype.org/content/repositories/snapshots/" m2compatible="true"/>

        <url name="jgit-describe">
            <ivy pattern="file:///${basedir}/etc/ivy/[module]/ivy.xml"/>
            <artifact pattern="http://shanemcc.github.com/jgit-describe/releases/jgit-describe-[revision].jar"/>
        </url>

        <packager name="packager" buildRoot="${user.home}/.ivy2/packager/build" resourceCache="${user.home}/.ivy2/packager/cache" preserveBuildDirectories="true">
            <ivy pattern="file:///${basedir}/etc/ivy/[module]/ivy.xml"/>
            <artifact pattern="file:///${basedir}/etc/ivy/[module]/packager.xml"/>
        </packager>
    </resolvers>
    <modules>
        <module organisation="com.github.shanemcc" name="jgit-describe" resolver="jgit-describe"/>
        <module organisation="org.eclipse.jgit" name="*" resolver="jgit"/>
        <module organisation="com.github.peichhorn" name="*" resolver="sonatype"/>
    </modules>
</ivysettings>