cvs-fast-export, formerly "parsecvs", does what its new name implies:
exports CVS repositories in a format suitable for git fast-import.
This program analyzes a collection of RCS files in a CVS repository
(or outside of one) and, when possible, emits an equivalent history
in the form of a fast-import stream. Not all possible histories can
be rendered this way; the program tries to emit useful warnings when
it can't. The program can also produce a visualization of the
resulting commit DAG in the DOT format handled by the graphviz suite.
The distribution includes a tool, cvssync, for fetching masters from
CVS remote repositories so cvs-fast-export can see them. You will
need rsync installed to use it.
A wrapper script called cvsconvert runs a conversion to git and
looks for content mismatches with the original CVS. You will need
CVS and Git installed to use it.
Also included is a tool called cvsreduce that strips content out of
trees of RCS/CVS masters, leaving only metadata structure in place.