Fossil's amend command covers a wide set of commit attributes. This can be applied not only to the latest commit, but also at any historical point. Looks like i

Fossil's amend command covers a wide set of commit attributes. This can be applied not only to the latest commit, but also at any historical point. Looks like it's implemented as a new special commit with some internal logic which overrides the original commit's metadata. This is actually done without altering the historical record of the original commit; it's transparent on the log/timeline, but the amend event entry can also be made visible. Very clever way of letting user fix some attribution mistakes/typos, yet not mangle the original commit. However, for amending the actual file changes, like it could be done with git --amend, Fossil requires another proper commit; for historical amends, the new commit has to be put onto a new branch. Fossil-scm website has a detailed help section for all commands, including the amend.