Bench update error how to solve?

hi frds,
anybody solve thede type of issue when update the bench??
ikhlas1@ikhlas1:~/bench$ bench update
You asked me to pull without telling me which branch you
want to merge with, and ‘branch.v0.93.merge’ in
your configuration file does not tell me, either. Please
specify which branch you want to use on the command line and
try again (e.g. ‘git pull ’).
See git-pull(1) for details.

If you often merge with the same branch, you may want to
use something like the following in your configuration file:
[branch “v0.93”]
remote =
merge =

[remote "<nickname>"]
url = <url>
fetch = <refspec>

See git-config(1) for details.
Error: None
Traceback (most recent call last):
File “/usr/local/bin/bench”, line 9, in
load_entry_point(‘bench==0.92’, ‘console_scripts’, ‘bench’)()
File “/home/ikhlas1/bench-repo/bench/”, line 56, in cli
File “/usr/local/lib/python2.7/dist-packages/click/”, line 716, in call
return self.main(*args, **kwargs)
File “/usr/local/lib/python2.7/dist-packages/click/”, line 696, in main
rv = self.invoke(ctx)
File “/usr/local/lib/python2.7/dist-packages/click/”, line 1060, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/usr/local/lib/python2.7/dist-packages/click/”, line 889, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/usr/local/lib/python2.7/dist-packages/click/”, line 534, in invoke
return callback(*args, **kwargs)
File “/home/ikhlas1/bench-repo/bench/”, line 210, in update
File “/home/ikhlas1/bench-repo/bench/”, line 188, in update_bench
exec_cmd(“git pull”, cwd=cwd)
File “/home/ikhlas1/bench-repo/bench/”, line 80, in exec_cmd
subprocess.check_call(cmd, cwd=cwd, shell=True)
File “/usr/lib/python2.7/”, line 511, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command ‘git pull’ returned non-zero exit status 1

Please keep issue to one post. Thanks,