In Visual Studio 2015, if you do View History (from the Actions menu on the Changes panel in Team Explorer):
Then right click on the commit you're interested in:
You can create a branch from there:
I cannot see a way to just checkout to the commit in Visual Studio.
Working with the command line you can do a checkout of the commit SHA you want to use:
git checkout 9eab01d9
When you are done, just check out master again:
git checkout master
You might get warnings about working on a detached head, in that case you could create a branch temporarily:
git checkout -b temp-branch-name 9eab01d9
It is a good idea to get comfortable with the Git command line, the Visual Studio tooling is coming along, but it misses a lot of features.