Students have been reminded of the concept of plagiarism, and they know that it will result in a failing grade. There will be an option to redo, and I understand that sometimes students plagiarize accidentally, but there should be an effort to phrase everything in the students' own words.
The following BrainPop video is a great refresher on the basics.
https://www.brainpop.com/technology/digitalcitizenship/plagiarism/
