Git Pull请求分支名称

I have a problem with the command "git pull". i have two stash users and in one user it works fine and in the other it gives an error message saying: You asked me to pull without telling me which branch you want to merge with. Please specify which branch you want to use on the command line and try again (e.g. 'git pull '). See git-pull(1) for details.I have a problem with the command "git pull". i