Here lives an experimental bot that does this: Commitfest → Github → ( AppVeyor, Travis ). You can find a report for the current CF, the next CF or individual patch authors.
News: Some information about this project can be seen in these slides from PGCon 2018. TL;DR: the plan discussed with the pginfra team is to integrate this into the Commitfest application. May take some time, but watch this space.
Please send feedback to thomas.munro-at-gmail.com.