<project>
<!--

At least GAV are required here

-->
	<properties>
		<skip.repo.clean>true</skip.repo.clean>
	</properties>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-antrun-plugin</artifactId>
				<version>1.7</version>
				<executions>
					<execution>
						<id>clear-repo</id>
						<phase>pre-clean</phase>
						<goals>
							<goal>run</goal>
						</goals>
						<configuration>
							<skip>${skip.repo.clean}</skip>
							<target>							
								<echo>Purging ${settings.localRepository}...</echo>
								<delete>
									<fileset dir="${settings.localRepository}">
										<include name="**/*.jar"/>
										<include name="**/*.pom"/>
										<include name="**/*.sha1"/>
									</fileset>
								</delete>
							</target>
						</configuration>
					</execution>
				</executions>
			</plugin>			
		</plugins>
	</build>
</project>

mvn_antrun_preclean_clear_repo

By default "mvn clean" cleans only target, for clear local repository run:
mvn clean -Dskip.repo.clean=false

Clear local maven repository via maven-antrun-plugin at pre-clean phase

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