how to deal with FARM_FINGERPRINT between BQ and golang

bq.sql

select
  FARM_FINGERPRINT("UserCustomerID + salt"), -- => -3587376224092439943
  mod(abs(FARM_FINGERPRINT("UserCustomerID + salt")), 100) -- => 43

golang.go

package main

import (
  "fmt"

  "github.com/dgryski/go-farm"
)

// http://cavaliercoder.com/blog/optimized-abs-for-int64-in-go.html
func abs(n int64) int64 {
  y := n >> 63
  return (n ^ y) - y
}

func main() {
  y := farm.Fingerprint64([]byte("UserCustomerID + salt"))
  fmt.Println(y)                   // => 14859367849617111673
  fmt.Println(int64(y))            // => -3587376224092439943
  fmt.Println(abs(int64(y)) % 100) // 43
}