In the terminal window, change your current directory to your project folder (ex: /var/www/Sites/project_a) and type the following line in and press enter.
find -type d -name .svn -print0 | xargs -0 rm -rf
All .svn folders should be removed now.
On local machine
ON Server
Go to the directory of the file you want to revert and find the version number in the log. Then revert to that log number.
svn log login.php svn up -r 1241 login.php svn up -r 2946 login.php
svn status | grep "^\?" | awk '{print $2}' | xargs svn add
NOTE: Does not work on files with spaces in the names