What do you use for your application code repository?
We are using Tortoise GIT with Visual Studio Team Services. We have a separate Repository for our automation. We established a directory structure so that the repository is always on the C drive. Anyone with rights to the repo can download it on their machine. This way we can download the repo on any test machine and use TestExecute (with a float license) to run the automation.
This also allows us to do Pull Requests in VSTS for other automation people to do a code review.
However we do not have test run results integrated with out sprint tasks but it does allow multiple automation development branches.