PowerCLI cloning tasks always running async

Question

I'm running a simple cloning script that should clone the VMs, then replace the network adapters too. The issue is that cloning tasks start async, the network adapter change tasks start before the clone is done and (of course) fails to change them.

The script:

foreach($VM in $VMs){
    newVM = New-VM -Name $VM.name.replace($oldEnv,$newEnv) -VM $VM -DiskStorageFormat Thin -Datastore "DS" -ResourcePool "RP"
    $allNetworkAdapters = $newVM | Get-NetworkAdapter  
    Foreach ($OldNetworkAdapter in $allNetworkAdapters){
       $OldNetwork = $OldNetworkAdapter.NetworkName
       $NewNetwork = $OldNetwork.replace($oldEnv,$newEnv)
       $newVM | Get-NetworkAdapter | Where {$_.NetworkName -eq $OldNetwork } | Set-NetworkAdapter -NetworkName $NewNetwork -Confirm:$false
    }
}

Is there any way to start the cloning task and wait until it is done to continue with the next line in the script ?