git clone 失败
报错： TCP connection reset by peer

[lj@localhost ~]$ git clone http://github.com/diem/diem.git && cd diem
正克隆到 'diem'...
fatal: unable to access 'http://github.com/diem/diem.git/': TCP connection reset by peer
[lj@localhost ~]$ git clone https://github.com/diem/diem.git && cd diem
正克隆到 'diem'...
fatal: unable to access 'https://github.com/diem/diem.git/': Failed connect to github.com:443; Connection refused
[lj@localhost ~]$ git --version
git version 1.8.3.1
[lj@localhost ~]$ sudo yum remove git

解决办法：
卸载老版本git

sudo yum remove git

安装新版本git

1. 安装依赖

sudo yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc -y
sudo yum install  gcc perl-ExtUtils-MakeMaker -y

2. 下载git安装包

wget https://mirrors.edge.kernel.org/pub/software/scm/git/git-2.28.0.tar.gz

3. 解压安装

tar -zxf git-2.28.0.tar.gz
mkdir -p ~/local/git 
cd git-2.28.0/
./configure --prefix=$HOME/local/git
make && make install

4.设置环境变量

export PATH=$HOME/local/git/bin:$PATH
#查看git版本
git version

[lj@localhost git-2.28.0]$ git version
git version 2.28.0

再次git clone 成功