(cros-chroot) gauravsh@gauravsh ~/trunk/src/scripts $ cros_workon start chromeos-chrome
INFO    : Setting Chrome dependencies to the correct revision.
pinning project src/breakpad/src

ERROR: Failed to run a command.
Failed command "['git', 'checkout', '09efa79710f20bdc342bd9389b10fb66ba5ffa12']" with extra env None
fatal: reference is not a tree: 09efa79710f20bdc342bd9389b10fb66ba5ffa12

INFO    : Started working on 'chromeos-base/chromeos-chrome' for 'x86-generic'