Some people in my class did straight rips of other artworks, probably 5-10 students in total.
I didn't personally, however I did do a collage of technical drawings, where I drew photographs of real objects. However the fact that I made this into a collage makes this Post Modern, thus not suspect to plagiarism. I'd consider it eclecticism, the borrowing of other 'ideas', in my case the borrowing of other photographed still technological objects.
To be safe, drawing another artwork or painting etc another artwork can be okay... IF you put a twist of your own into it, that's considered post modern, as is, as mentioned above the borrowing of ideas.
Hope I helped.
But yes, it's unlikely you will be caught out plagiarizing a work, but it's best just in case, to edit it so that it's truly your own idea.
Remember, art through every agency, frame and practice, always links back to the artists ideals and intentions. Your ideals and intentions have to be unique for your major work.. try not to portray someone else's ideas, this has to be about YOU.