Excel copy a snippet cell A to cell B

This might be an easy one but in cell A2 I got a value of "123-123 Example Text" how can I make it copy only "123-123" and put the value in cell A3.

Second part in B2 I have "123-123" and in B3 I got "http://ift.tt/1CVbmKj" is there a way to tell it to take B2 and insert it instead of X in B3? Thanks God Bless You.