added test files

Author: apurv111

backup.py

@@ -11,7 +11,6 @@
 		if os.path.exists(os.path.join(path, repo_name)) == False:
 			cmd = 'git clone %s %s%s' % (line, path, repo_name)
 		else:
-			os.system('git --git-dir=%s%s%s %s' % (path, repo_name, '/.git', 'reset --hard HEAD')
-			cmd = 'git --git-dir=%s%s%s %s' % (path, repo_name, '/.git', 'pull')
+			cmd = 'git --git-dir=%s%s%s  --work-tree=%s%s %s' % (path, repo_name, '/.git', path, repo_name, 'pull')
 		os.system(cmd)
 os.system('rm list_of_repos.txt')