How to examine the content of a stash
Stashes are saved modifications of the working tree. Saving a stash allows to quickly clean-up a working tree without loosing the changes. Later one can re-apply the saved stash to continue with the partly done work.
To examine the saved modifications (the content of a stash), open the log, ensure that the checkbox in front of the stash in question in the Branches view is selected and scroll to the stash. You will see up to 3 commits referring to the index and working tree changes as well as to untracked files.