Sourcetree is a graphical front-end for the Git revision control system. First created in 2005 for the community of Linux kernel developers, Git has become one of the most popular revision control systems among technical people of all kinds. For example, the Library of Congress maintains Git repositories (hosted on GitHub) for a number of projects they are working on. These include XSLT to translate MARC records into BIBFRAME RDF, reference implementations of the BagIt standard in a number of languages, XML schemas for a number of metadata standards, and more. Users typically access Git repositories using the Git command-line tool. Unfortunately, this tool is famously hard to learn - so much so that papers on Git's obtuseness have been published as computer science literature. Sourcetree provides a much more intuitive, visual tool for interacting with Git repositories. It also includes a set of comprehensive tutorials covering the basic concept of Git. Sourcetree is available for Windows and macOS.