composer install 出现 RuntimeException Failed to execute
报错：composer.json 的 require添加新包 需要删除composer.lock和vender 从新composer install
[RuntimeException]
Failed to execute git checkout 'xxxx' -- && git reset --hard 'xxxxx' --
error: unable to read sha1 file of xxxxxx (xxxx)
......
......
解决方法：
composer clear
composer install
