tree dfceeaec494b1f9c46f9d006fe52bfa867f83e14
parent 1ba52e05bdd1029102eee5ca09a2d3734d4841f2
author Ankur Mittal <anmittal@google.com> 1479345325 -0800
committer Ankur Mittal <anmittal@google.com> 1509761468 -0700

Add support for changing remote URL

Various git behaviour which can arise due to this are:
1. New remote doesn't have one of the tracking remote branch
   Behaviour: Git complains that upstream is gone when you checkout old
   branch
2. New remote had tracking branch A, which old remote also have but with
   a different tree
   Behaviour: Git complains that local branch has diverged from the
   remote branch

Change-Id: Ia5072980486df2d8feb2279d9d026bc8fde193e5