After fetching, prune any deleted remote-tracking branches.
After fetching, prune any deleted remote-tracking branches.

-p, --prune
  After fetching, remove any remote-tracking branches which no longer
  exist on the remote.

Borgaard/git-up,jeremywiebe/git-up,bhalothia/git-up,zhangweiyu51/git-up,Loke155/git-up,albfan/git-up,milosm/git-up,christer155/git-up,aanand/git-up