Zach mentioned in IRC that the LLDB git repository seemed to be having some issues. Starting an email thread so he can fill you in with the details.
So the git mirror seems to be stuck on r232019, but the most recent revision is r232175. I know it’s not my local repo because I can do a fresh git clone http://llvm.org/git/lldb.git and it still only pulls up to r232019.
Curiously, the first missing commit is r232022 which is a test commit from someone who I guess just got commit access. So maybe that messed it up somehow?
At the moment, the only way to sync to tip is to use “git svn rebase”, which I guess pulls directly from SVN instead of from the git mirror.