CentOS 6.x git 1.7 clone gitlab 验证失败

最近要用测试机（CentOS6)测试项目代码，代码放在gitlab。
yum安装的git版本是1.7.1，在clone gitlab repo的时候，报如下错误。

error: The requested URL returned error: 401 Unauthorized while accessing https://gitlab.com/arkii/xxx.git/info/refs
fatal: HTTP request failed

解决办法是升级git版本到2以上。
升级过程如下

wget https://github.com/git/git/archive/v2.4.3.tar.gz
yum -y install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc xmlto docbook2x docbook2X
tar -zxf v2.4.3.tar.gz
cd git-2.4.3
make configure
./configure --prefix=/usr/local/git2.4.3
make -j8 all doc info
make install install-doc install-html install-info
ln -s /usr/local/git2.4.3/bin/git /usr/bin/