Make a build directory:
mkdir Andoid (or whatever name you choose)
cd Android (or the name you chose)
To initialize your local repository using the CM9 manifest, use commands like these:
repo init -u git://github.com/CyanogenMod/android.git -b ics
curl -L -o .repo/local_manifest.xml -O -L https://raw.github.com/KFire-Android/android_local_manifest/ics/local_manifest.xml
Then to sync up:
repo sync
J'ai fait ça. Mais actuellement rien dans Android (la synchro est pas finie).