git fetch tag 获取远程tag

获取远程的tag( 远程存在，本地不存在)
git fetch origin tag 2.4.7

　　出现如下文字，说明获取远程tag成功

remote: Counting objects: 2, done
remote: Finding sources: 100% (2/2)
remote: Total 2 (delta 0), reused 2 (delta 0)
Unpacking objects: 100% (2/2), done.
From ssh://project_name
 * [new tag]         2.4.7      -> 2.4.7
 * [new tag]         2.4.6      -> 2.4.6