How to copy a non-pointer value to a pointer indirected value via reflection

I want the Set method below to set the APtr field of a passed in B struct to a value that gets passed in by value, i.e. without a pointer indirection.

For that to work via go reflection, I will probably have to copy that value to a new location that I have the address of? Either way, how can I get this to work? What I have is a working version for non-pointers values.

type A struct {
    AnInt int
}

type B struct {
    AnA   A
    APtr *A
}

func Set(strukt interface{}, fieldName string, newFieldValue interface{}) {
    struktValueElem := reflect.ValueOf(strukt).Elem()
    field := struktValueElem.FieldByName(fieldName)
    newFieldValueValue := reflect.ValueOf(newFieldValue)
    if field.Kind() == reflect.Ptr {
        // ?? implement me
    } else { // not a pointer? more straightforward:
        field.Set(newFieldValueValue)
    }
}

func main() {
    aB := B{}
    anA := A{4}
    Set(&aB, "AnA", anA) // works
    Set(&aB, "APtr", anA) // implement me
}

Playground: https://play.golang.org/p/6tcmbXxBcIm