### Problem to solve <!-- What is the user problem you are trying to solve with this issue? --> Sys admins may need to compare references of git repositories between copies. ### Proposal <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> Create a rake task that outputs checksums of refs for specific repositories or cycle through all repositories. ### Intended users Who will use this feature? If known, include any of the following: types of users (e.g. Developer), personas, or specific company roles (e.g. Release Manager). It's okay to write "Unknown" and fill this field in later. Personas are described at https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/ * [Sidney (Systems Administrator)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sidney-systems-administrator) ### User experience goal Easily output checksums ### Documentation Should be documented in https://docs.gitlab.com/ee/administration/raketasks/check.html