The git repository is empty. The actual source is available at https://code.google.com/p/google-glass-kernel-source/downloa...
[1] : https://groups.google.com/forum/?fromgroups=#!msg/android-bu...
The repository is indeed empty -- no branches, no nothing.
SHA1 Checksum: 555661ff568a0d89de213ea0c32915cd908cc582