"Fetch changes" - It is only getting of changes from a remote repository. There is similar command of GIT - "PULL changes". But pay attention, "PULL changes" it is more difficult command, except reception of changes from remote repository, it does merge to the selected branch.
Therefore usually it is more convenient to use "PULL changes", but there are cases when it is necessary to execute only "Fetch changes" and anything more.

We will not describe a command wizard fetch as it is very similar to a wizard of "PULL changes" command. Unique difference in a wizard of "Fetch changes" command it is absence of a "Merge branch" field as merge is not required.