git/refs/heads/master was not found in commit?

I'm a newb to git.  I'm trying to "git svn clone" a tried and true  
subversion repo but it fails after scanning
the 2069 commit, and spits out:

vendor/plugins/locking/.git/refs/heads/master was not found in commit
484775a7dc66b9c91188a5ad52c30c371ff8d702 (r2068)

Which is right.  It isn't in 2068, it was checked in at 2069.

The 2069 commit was some code I had "git clone"d from github into a  
subfolder of the parent project
that's checked into subversion.  I've tried to replicate this behavior  
by checking in this same git repo into a
smaller svn repo and doing the git svn clone, but alas that time it's  
successful.

Anyone have any ideas how I can get around this?  Thank you!