Ok, my mistake. I think I should run the plugin goal like this:
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'svn-revision-number'.
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin 'org.apache.maven.plugins:maven-svn-revision-number-plugin' does not exist or no valid version could be found
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Thu Mar 07 13:38:51 GMT 2013
[INFO] Final Memory: 1M/15M
[INFO] ------------------------------------------------------------------------
Any help?