Capstone projects are commonly carried out at the end of an undergraduate program of study in software engineering or computer science. While traditionally such projects solely focussed on the software product to be developed, in more recent work importance of the development process has been stressed. Currently process quality assessment techniques are limited to review of intermediary artifacts, self- and peer evaluations. We advocate augmenting the assessment by mining software repositories used by the students during the development. We present the assessment methodology and illustrate it by applying to a number of software engineering capstone projects.