git rev-parse broken on Git for Windows

  9c7304e3e39ed397b3cc6566573333e2698a52b4 (print the usage string on 
stdout instead of stderr) and then 
47e9cd28f8a404a0d6293935252ddca5fc243931 (parseopt: wrap rev-parse 
--parseopt usage for eval consumption) break the following line from the 
manual and 'git subtree' on msysGit:

eval $(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)

Running 'git revert' on both changelists causes the 'git rev-parse --parseopt' to work again.

What was 9c7304e trying to solve?

Thanks.

Josh