[U-Boot] git pull fails ?!

Hello,

at this moment i tried to fetch newest u-boot using 'git pull'

GIT answered to me:

error: Unable to find 524123a70761110c5cf3ccc5f52f6d4da071b959 under http://git.denx.de/u-boot.git Cannot obtain needed object 524123a70761110c5cf3ccc5f52f6d4da071b959 error: Fetch failed.

does anybody know whats going wrong?

best regards, Hannes