I want to restore backup from production environment to dev/test environment to get latest content from production environment. User/groups who have permissions on production are totally different than users in dev/test environment. I don't want to copy permissions from production to test/dev, is it possible to do with any SharePoint backup method. If it is not possible is there any easy way to regenerate permissions on dev/test which were there before restore, any scripts or code techniques?
You can use
export-spweb / import-spweb which by default will not carry over user security settings.
Command reference: http://technet.microsoft.com/en-us/library/ff607895(v=office.15).aspx