I've files with below content:

```
76a6f0f631888fbd359420796093d19a3928123d remotes/origin/feature/ASC-122356
417435aceb671e41213697055b86d860d9a9a61c remotes/origin/feature/ASC-122356-3762
ae863a41fef068215be1529216e9dbba1314fa6f remotes/origin/master

```

I want to search if `origin/master` pattern is there or not in the file. 

I'm currently doing like `grep -e '^\S\+ origin/master$'` but it's not correct. How can I do it?