build.xml

<project default="cleanpackage">
    <!--
    Check if this URL changed:
    http://git.jetbrains.org/?p=teamcity/git-plugin.git;a=history;f=git-agent/src/jetbrains/buildServer/buildTriggers/vcs/git/agent/command/impl/FetchCommandImpl.java
    If there are changes to the file beyond 2014-11-07, then FetchCommandImpl needs to be updated
    Unpack teamcity next to this directory and run ANT
    -->
    <property name="teamcity.dir" location="../teamcity"/>
    <property name="classes" location="${basedir}/out/classes"/>
    <property name="packing.dir" location="${basedir}/out/packing"/>
    <target name="clean">
        <delete dir="${classes}"/>
        <delete dir="${packing.dir}"/>
    </target>
    <target name="unpack">
        <unzip src="${teamcity.dir}/webapps/ROOT/WEB-INF/plugins/jetbrains.git.zip" dest="${packing.dir}/1"/>
        <unzip src="${packing.dir}/1/agent/jetbrains.git.zip" dest="${packing.dir}/2"/>
    </target>
    <target name="compile" depends="unpack">
        <mkdir dir="${classes}"/>
        <javac srcdir="src" destdir="${classes}" target="1.6" source="1.6" includeantruntime="false">
            <classpath>
                <fileset dir="${teamcity.dir}/webapps/ROOT/WEB-INF/lib" includes="*.jar"/>
                <fileset dir="${teamcity.dir}/devPackage" includes="*.jar"/>
                <fileset dir="${packing.dir}/2/jetbrains.git/lib" includes="*.jar"/>
            </classpath>
        </javac>
    </target>

    <target name="package" depends="compile">
        <zip destfile="${packing.dir}/3/jetbrains.git/lib/git-agent.jar">
            <fileset dir="${classes}"/>
            <zipfileset src="${packing.dir}/2/jetbrains.git/lib/git-agent.jar"
                        excludes="jetbrains/buildServer/buildTriggers/vcs/git/agent/command/impl/FetchCommandImpl.class"/>
        </zip>
        <zip destfile="${packing.dir}/4/agent/jetbrains.git.zip">
            <fileset dir="${packing.dir}/2" excludes="jetbrains.git/lib/git-agent.jar"/>
            <fileset dir="${packing.dir}/3"/>
        </zip>
        <zip destfile="${packing.dir}/jetbrains.git.zip">
            <fileset  dir="${packing.dir}/1" excludes="agent/jetbrains.git.zip"/>
            <fileset  dir="${packing.dir}/4"/>
        </zip>
    </target>

    <target name="cleanpackage" depends="clean,package"/>
</project>