[Discuss-gnuradio] git fetch failing

I've tried to recently update gnuradio, Getting a strange git error when doing a git fetch:

$ git fetch -v
error: Unable to find 7c17d1cd1daa08fc3b6613f11f553f41ae7b3bd9 under http://gnuradio.org/git/gnuradio.git
Cannot obtain needed object 7c17d1cd1daa08fc3b6613f11f553f41ae7b3bd9
error: Fetch failed.

It's been about 6 weeks since I last updated (master) from the repository. Never an issue previously.

Any ideas? 

-- Tom, N5EG