Thank you for the question.  The vine might be climbing false buckwheat Fallopian scandens or black bindweed Fallopian convolvulus.  If you let it flower, you might be able to tell which one it is.  Climbing false buckwheat is a perennial plant that can have showy flowers but is fast growing and aggressive.  Black bindweed is a fast growing weedy annual plant that can be invasive.  If you let it grow and bloom, be sure to remove the plant before it goes to seed to prevent future unwanted recurrence.  Read about each plant here: