How can we use channels in Go in place of mutex?

Channels combine communication—the exchange of a value—with synchronization—guaranteeing that two calculations (goroutines) are in a known state.

How is it possible to use the channels in Google Go to perform the functionality of mutex?

package main

import "sync"

var global int = 0
var m sync.Mutex

func thread1(){
    m.Lock()
    global = 1
    m.Unlock()
}

func thread2(){
    m.Lock()
    global = 2
    m.Unlock()
}

func main(){
   go thread1()
   go thread2()
}