Informally, you might be greeted by kwe kwe.

 

More often, you would be greeted by Sekon.  There are 6 or 7 different Mohawk reserves.  Most are in Canada.  The greeting is pronounced the same on these different reserves but are spelled differently each place.  Akwesasne is in Ontario, Quebec and New York State.  The American side spells differently than the Canadian side.   Spellings range from sago to sagon to seh:kon to sekon to se:kon - it is pronounced very much like say go with an almost silent n at the end.