hi,all
i got some problems when i download linaro-android 4.2.2 with the following command:
linaro_android_build_cmds.sh -m pinned-manifest.xml
it stoped at fetching projects:99%(348/351),so i interrupt it by pressing ctrl +c and run android/repo sync. then i got some errors as follows:

Fetching projects:   2% (8/351)  error: Unable to find 3f906009dbb20057c6f6f45069c32d078bd3d27f under http://android.git.linaro.org/git-ro/platform/build
Cannot obtain needed object 3f906009dbb20057c6f6f45069c32d078bd3d27f
while processing commit eab7126650f75dd9c240574912791b2bafc80bae.
error: Fetch failed.
Fetching projects:  19% (67/351)  error: Unable to find 3f906009dbb20057c6f6f45069c32d078bd3d27f under http://android.git.linaro.org/git-ro/platform/build
Cannot obtain needed object 3f906009dbb20057c6f6f45069c32d078bd3d27f
while processing commit eab7126650f75dd9c240574912791b2bafc80bae.
error: Fetch failed.
Fetching projects:  33% (116/351)  error: Cannot fetch platform/build
Fetching projects:  35% (123/351) 
error: Exited sync due to fetch errors

does anyone know how can i fix it?