First, set up the parent repo:
- Open your forked repo in SourceTree.
- Select Repository ➫ Repository Settings… in the menu (or press ). ⇧ ⌘ ,
- In the Remotes pane, press Add.
- Enter any name you like (often
upstream
ormaster
) and the URL / path to the parent repo. - Press OK, then OK.
Now, to update:
- Select Pull in the toolbar.
- In the “Pull from repository” drop-down, switch from your fork to the repo you just added.
- Press OK.
- (Optional) Once you pull, you may want to push any new content up to the server.