### Summary The commits API, which gives information about a commit, omits a crucial detail: the tree hash of the commit. ### Steps to reproduce send a GET to an api commits endpoint. E.g.: https://gitlab.com/api/v4/projects/2752563/repository/commits/c65fb34347fc722dcc3874cafc1b5ca6628f2198 ### Example Project Works in any project ### What is the current *bug* behavior? The tree hash is missing from the json output. ### What is the expected *correct* behavior? Expected: should include the git tree hash. In this case, `b693a09d004675f506e2cd4e864fc78e9c582204` . ### Output of checks This bug happens on GitLab.com #### Results of GitLab environment info ### Possible fixes include the tree hash. For reference, here's the sample js output from github, which includes the tree hash: https://api.github.com/repos/phdru/ppu/git/commits/63c535d7c6b151c210e344dd4b745407f3911d76