When repository is cloned, and continue with the next command at README page (git submodule update --init) I found the next error (complete log):
/WLANAudit-Android$ git submodule update --init
Submodule 'ActionBarSherlock' (https://github.com/JakeWharton/ActionBarSherlock.git) registered for path 'ActionBarSherlock'
Submodule 'NumberPicker' (https://github.com/mrn/numberpicker.git) registered for path 'NumberPicker'
Cloning into 'ActionBarSherlock'...
remote: Counting objects: 17330, done.
remote: Compressing objects: 100% (4669/4669), done.
remote: Total 17330 (delta 9740), reused 16941 (delta 9460)
Receiving objects: 100% (17330/17330), 10.02 MiB | 863 KiB/s, done.
Resolving deltas: 100% (9740/9740), done.
fatal: reference is not a tree: 196c380495157e77a57a6e47ea1a8a35b9e9965e
Cloning into 'NumberPicker'...
remote: Counting objects: 414, done.
remote: Compressing objects: 100% (233/233), done.
remote: Total 414 (delta 135), reused 376 (delta 107)
Receiving objects: 100% (414/414), 167.92 KiB | 110 KiB/s, done.
Resolving deltas: 100% (135/135), done.
fatal: reference is not a tree: 04cdc2cd228d687142e668535bd7556493765e63
Unable to checkout '196c380495157e77a57a6e47ea1a8a35b9e9965e' in submodule path 'ActionBarSherlock'
Unable to checkout '04cdc2cd228d687142e668535bd7556493765e63' in submodule path 'NumberPicker'