git svn clone of subversion's own code failing

Using MacPorts with git 1.7.0.4 and Subversion 1.6.11, ironically, cloning Subversion's own source code is failing.  I'm using a larger log window size to make the scan to svn's first commit in the repository much faster:

$ git svn clone --log-window-size 5000 -s https://svn.apache.org/repos/asf/subversion

It ends up failing with:

r855619 = c93a05b8f94c53b8748ffe9352445209fe648e87 (refs/remotes/trunk)
	M	contrib/client-side/svn-clean
r855620 = a6b138d3112b1ea0b51b112c6598aae5644369ae (refs/remotes/trunk)
	M	subversion/bindings/swig/core.i
	M	subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.c
	A	subversion/bindings/swig/python/libsvn_swig_py/svn_old_swig.h
	M	subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.h
	M	subversion/bindings/swig/include/svn_global.swg
	M	subversion/bindings/swig/include/svn_types.swg
r855621 = 41bbc61c035218937f1032381f02c481c8653a22 (refs/remotes/python-bindings-improvements)
W:svn cherry-pick ignored (subversion/trunk:855604) - missing 79 commit(s) (eg 462871a2ededa70304eeb99affe550fd029557b5)
r855622 = 2c62a0cca702ffe59dabee92220cf28aedfe1c84 (refs/remotes/python-bindings-improvements)
fatal: ambiguous argument '3b290983fbd7b401e4d1d20256378ba3657cf7d6^..862ea856c2acad5035ce14758fb928c07d7b7f6b': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions
rev-list 3b290983fbd7b401e4d1d20256378ba3657cf7d6^..862ea856c2acad5035ce14758fb928c07d7b7f6b: command returned error: 128

I've tried two separate clones with the exact same error.

Trying to finish the clone then gets this:

$ cd subversion $ git svn fetch && git svn rebase fatal: ambiguous argument '3b290983fbd7b401e4d1d20256378ba3657cf7d6^..862ea856c2acad5035ce14758fb928c07d7b7f6b': unknown revision or path not in the working tree. Use '--' to separate paths from revisions rev-list 3b290983fbd7b401e4d1d20256378ba3657cf7d6^..862ea856c2acad5035ce14758fb928c07d7b7f6b: command returned error: 128

Regards, Blair