Actually, Fedora doesn't use md5 it uses SHA1SUM.
If you download the SHA1SUM file you see in the directory you are downloading from and put it in the same directory as the downloaded iso you can cd into that directory and run the command:
(case is important) and it will report on the condition of your downloaded iso.
Note that most of the Fedora SHA1SUM files are capable of checking more than one iso and you will therefore see an error for any iso that you haven't downloaded. Also, if you are checking a DVD iso, even on a fairly fast machine, it can take a minute or more before you see any output.