I got this error when run this firmware update command. Before this update was succesfully completed by this command: sudo apt-get update && sudo apt-get upgrade
pi@Raspi-2 ~ $ sudo rpi-update
Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS
Performing self-update
ARM/GPU split is now defined in /boot/config.txt using the gpu_mem option!
Updating firmware (this will take a few minutes)
error: rev-list died of signal 11
fatal: The remote end hung up unexpectedly
sudo apt-get update && sudo apt-get upgrade
again?0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.