fossil help import
Usage: fossil import --git NEW-REPOSITORY

Read text generated by the git-fast-export command and use it to
construct a new Fossil repository named by the NEW-REPOSITORY
argument.  The <b>get-fast-export</b> text is read from standard input.

The git-fast-export file format is currently the only VCS interchange
format that is understood, though other interchange formats may be added
in the future.