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You can use this command to delete CVS/svn folders on given project.
xargs deals badly with special characters (such as space, ' and "). In this case if you have a file called '12" record'.
Parallel https://savannah.nongnu.org/projects/parallel/ does not have this problem.
Both solutions work bad if the number of files is more than the allowed line length of the shell.
Fetch comical VC commit messages from whatthecommit.com
Wipes out unversioned files from SVN working copy. Much safer to run than your own incantations.
I find svn-clean especially useful for when "svn revert -R ." won't undo the many merged in new files. Manually rm'ing all the files with a status of '?' would be a hassle.
In debian at least, the svn-clean command comes with the subversion-tools package, otherwise you get the perl script with "svn export