Don't use remote name with --all

Change-Id: I724b368378bc1fe61128299e06fcf66999d25d3d
Reviewed-on: http://review.couchbase.org/41960
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>
Don't depend on 'git fetch --all' existing

Change-Id: I6172e27e0f5c32952db6edc2a71c6ba681060dd9
Reviewed-on: http://review.couchbase.org/41961
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>