I got it by hacking the source (thanks @luggi for the idea!) . You have to revert the commit as suggested by @luggi but you also have to comment out the hash checking and RUN WITH --DRY-RUN.
// Check if the hashes are the same
//same, hash, _ := CheckHashes(src, dst)
//if !same {
// Debugf(src, “%v differ”, hash)
// return false
// }
// if hash == HashNone {
// // if couldn’t check hash, return that they differ
// return false
// }
If someone wants a precompiled linux binary, im happy to provide it. Dont use it for anything but this and please test before you start mangling your stuff! I just updated 3 destinations at around 3TB each. Beautiful.