commits.

--show-original-ids::
	Add an extra directive to the output for commits and blobs,
	`original-oid <SHA1SUM>`.  While such directives will likely be
	ignored by importers such as git-fast-import, it may be useful
	for intermediary filters (e.g. for rewriting commit messages
	which refer to older commits, or for stripping blobs by id).

--reencode=(yes|no|abort)::
	Specify how to handle `encoding` header in commit objects.  When
	asking to 'abort' (which is the default), this program will die
	when encountering such a commit object.  With 'yes', the commit
	message will be re-encoded into UTF-8.  With 'no', the original
	encoding will be preserved.

--refspec::
	Apply the specified refspec to each ref exported. Multiple of them can
	be specified.

[<git-rev-list-args>...]::
	A list of arguments, acceptable to 'git rev-parse' and
	'git rev-list', that specifies the specific objects and references
	to export.  For example, `master~10..master` causes the
	current master reference to be exported along with all objects
	added since its 10th ancestor commit and (unless the
	--reference-excluded-parents option is specified) all files
	common to master{tilde}9 and master{tilde}10.

EXAMPLES
--------

-------------------------------------------------------------------
$ git fast-export --all | (cd /empty/repository && git fast-import)
-------------------------------------------------------------------

This will export the whole repository and import it into the existing
empty repository.  Except for reencoding commits that are not in
UTF-8, it would be a one-to-one mirror.

-----------------------------------------------------
$ git fast-export master~5..master |
	sed "s|refs/heads/master|refs/heads/other|" |
	git fast-import
-----------------------------------------------------

This makes a new branch called 'other' from 'master~5..master'
(i.e. if 'master' has linear history, it will take the last 5 commits).

Note that this assumes that none of the blobs and commit messages
referenced by that revision range contains the string
'refs/heads/master'.


ANONYMIZING
-----------

If the `--anonymize` option is given, git will attempt to remove all
identifying information from the repository while still retaining enough
of the original tree and history patterns to reproduce some bugs. The
goal is that a git bug which is found on a private repository will
persist in the anonymized repository, and the latter can be shared with
git developers to help solve the bug.

With this option, git will replace all refnames, paths, blob contents,
commit and tag messages, names, and email addresses in the output with
anonymized data.  Two instances of the same string will be replaced
equivalently (e.g., two commits with the same author will have the same
anonymized author in the output, but bear no resemblance to the original
author string). The relationship between commits, branches, and tags is
retained, as well as the commit timestamps (but the commit messages and
refnames