It's sad to say, but all versions of Locky ransomware, including .shit can't be decrypted. The only thing that you can do is to delete the virus from your PC and try to avoid the suchlike infection next time. Of course, you should keep the encrypted files somewhere, to be able to decrypt them when the decryption tool will be released. If you're interested in this - this article might be helpful for you:
How to restore files, corrupted by ransomware. It contains all the most effective methods to recover your data, and the links to most well-known websites on which you might receive help with your problem.