【修改】：解决 env 切换版本出现错误的问题

Author: SummerGift

cmds/cmd_package.py

@@ -220,7 +220,9 @@ def install_pkg(env_root, bsp_root, pkg):
         cmd = 'git clone ' + package_url + ' ' + repo_path
         os.system(cmd)
         os.chdir(repo_path)
-        cmd = 'git checkout -q ' + ver_sha
+        
+        #print("Checkout SHA : %s"%ver_sha)
+        cmd = 'git reset --hard ' + ver_sha
         os.system(cmd)
 
         # If there is a .gitmodules file in the package, prepare to update the
@@ -248,9 +250,6 @@ def install_pkg(env_root, bsp_root, pkg):
         cmd = 'git remote set-url origin ' + url_from_json
         os.system(cmd)
 
-        cmd = 'git reset --hard origin/master'
-        os.system(cmd)
-
         os.chdir(beforepath)
     else:
         # Download a package of compressed package type.