In i.MX Yocto Project User's Guide document

Quick Start part:

Install the `repo` utility:
To get the BSP you need to have "repo" installed. This only needs to be done once.
$: mkdir ~/bin
$: curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$: chmod a+x ~/bin/repo
$: PATH=${PATH}:~/bin

由于这里安装repo的REPO_URL是谷歌的源，而由于国内“墙”的原因导致下载失败，错误为

fatal: Cannot get https://gerrit.googlesource.com/git-repo/clone.bundle
fatal: error [Errno 101] Network is unreachable

针对这个问题，解决方案如下：

1. 获取repo

# cd ~
# mkdir bin
# cd bin
# curl https://mirrors.tuna.tsinghua.edu.cn/git/git-repo > ~/bin/repo
# chmod a+x ~/bin/repo
# export PATH=${PATH}:~/bin

2. 修改repo文件

打开~/bin/repo文件并修改google地址
# vi ~/bin/repo

From
REPO_URL = ' https://gerrit.googlesource.com/git-repo '
To
REPO_URL = ' https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/ '

参考： https://community.nxp.com/docs/DOC-343242