<link type="application/atom+xml" rel="alternate" href="/feeds/p/dcef3/gitchanges/basic">
Same for Github projects, e.g. at https://github.com/petdance/ack2 you will find:
<link href="https://github.com/petdance/ack2/commits/dev.atom" rel="alternate" title="Recent Commits to ack2:dev" type="application/atom+xml" />
Same for Github projects, e.g. at https://github.com/petdance/ack2 you will find: