Use your XMR seed with the XMO client to get your funds back.  You can still exchange them to XMR at Changelly, but I wouldn't count on that being the case forever, as XMO is not, as far as I know, used by anyone, at all, for anything.  

XmanXU has posted on github [here](https://github.com/XmanXU/monero) the fork.  The person advertised the publication on [reddit](https://www.reddit.com/r/CryptoCurrency/comments/8456rs/introducing_monero_original_xmo/) as well, to near-universal disapproval, by the way. It seems to be a scam coin that actually hurts the privacy of XMR itself.