Default [Q] How to only sync specific branch

Hi guy, so when I used
Code:
repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.6_r0.9
it worked fine, but when I ran
Code:
repo sync
, It seemed to sync all branches, any help?
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My Device
 
Huawei Ascend Y210-0100
ROM:ics rom v1 by A&A
CWM 5.0.2.8
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