imx6q yocto下载失败是为什么？

按照《i.MX_Yocto_Project_Users_Guide.pdf》里面说的
repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-4.1-krogoth
这个下载时候，报错连接不上，如下

root@ubuntu:/home/fsl-release-bsp# repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-4.1-krogoth
repo: warning: Python 2 is no longer supported; Please upgrade to Python 3.6+.
Downloading Repo source from https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/
remote: Counting objects: 5527, done.
remote: Compressing objects: 100% (2706/2706), done.
remote: Total 5527 (delta 3567), reused 4574 (delta 2756)
Receiving objects: 100% (5527/5527), 2.00 MiB | 768 KiB/s, done.
Resolving deltas: 100% (3567/3567), done.
repo: Updating release signing keys to keyset ver 2.3
repo: warning: Python 2 is no longer supported; Please upgrade to Python 3.6+.
repo: warning: git-1.9.1+ will soon be required; please upgrade your version of git to maintain support.
Downloading manifest from git://git.freescale.com/imx/fsl-arm-yocto-bsp.git
fatal: unable to connect to git.freescale.com:
git.freescale.com[0: 192.88.156.202]: errno=Connection refused

manifests:
fatal: unable to connect to git.freescale.com:
git.freescale.com[0: 192.88.156.202]: errno=Connection refused

请问还有在哪儿可以下载吗