The "merge" command:

Usage: fossil merge ?OPTIONS? ?VERSION?

The argument VERSION is a version that should be merged into the current checkout. All changes from VERSION back to the nearest common ancestor are merged. Except, if either of the --cherrypick or --backout options are used only the changes associated with the single check-in VERSION are merged. The --backout option causes the changes associated with VERSION to be removed from the current checkout rather than added. When invoked with the name cherry-pick, this command works exactly like merge --cherrypick.

If the VERSION argument is omitted, then Fossil attempts to find a recent fork on the current branch to merge.

Only file content is merged. The result continues to use the file and directory names from the current checkout even if those names might have been changed in the branch being merged in.

Options:

--backout

Do a reverse cherrypick merge against VERSION. In other words, back out the changes that were added by VERSION.

--baseline BASELINE

Use BASELINE as the "pivot" of the merge instead of the nearest common ancestor. This allows a sequence of changes in a branch to be merged without having to merge the entire branch.

--binary GLOBPATTERN

Treat files that match GLOBPATTERN as binary and do not try to merge parallel changes. This option overrides the "binary-glob" setting.

--cherrypick

Do a cherrypick merge VERSION into the current checkout. A cherrypick merge pulls in the changes of the single check-in VERSION, rather than all changes back to the nearest common ancestor.

-f|--force

Force the merge even if it would be a no-op.

--force-missing

Force the merge even if there is missing content.

--integrate

Merged branch will be closed when committing.

-K|--keep-merge-files

On merge conflict, retain the temporary files used for merging, named *-baseline, *-original, and *-merge.

-n|--dry-run

If given, display instead of run actions

-v|--verbose

Show additional details of the merge