Problem with get linux kernel source

I have got problems with “git clone … linux-socfpga.git”. The script, git_clone.sh is with Altera 14.0 as follows.

# !/bin/bash -ex

git clone http://git.rocketboards.org/linux-socfpga.git

pushd linux-socfpga && git checkout -t -b socfpga-3.13-rel14.0 origin/socfpga-3.13-rel14.0 && popd

When I run this script ./git_clone.sh from an Altera embedded command shell, it never finishes although I have bypassed the company proxy. Therefore, I can’t get the source code of Linux Kernel. I can’t carry on those examples related to Linux Kernel. Is there anything wrong with the script? Is there any other problem? Please help. Thanks