If I've understood your question correctly Sourcetree doesn't support that functionality in the same way. If your repository is honest on a remote service for which you have an account setup in Sourcetree, e.g. GitHub, Bitbucket then you can use the Remote button in the toolbar to open the web hosted view of the repository.
Supported Platforms macOS Windows We recently introduced support for additional hosting services such as GitHub Enterprise, GitLab (Cloud, Community Edition, Enterprise Edition), and...
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