The "interwiki" command:

Manage the "intermap" that defines the mapping from interwiki tags to complete URLs for interwiki links.

fossil interwiki delete TAG ...

Delete one or more interwiki maps.

fossil interwiki edit TAG --base URL --hash PATH --wiki PATH

Create an interwiki referenced call TAG. The base URL is the --base option, which is required. The --hash and --wiki paths are optional. The TAG must be lower-case alphanumeric and must be unique. A new entry is created if it does not already exit.

fossil interwiki list

Show all interwiki mappings.