CyanogenMod/android — comment on commit 86da05c57f010fb717ea9d027a374f497bc597ba
File:  line 0
By jokersax:

A workaround is to change back to git:// and remove the prebuilt fetch. Then git clone https://github.com/CyanogenMod/android_prebuilt.git -b ics

it's an extra step but might help till the issue is resolved