$ git clone -n https://src.fedoraproject.org/rpms/pypy3.9.git /var/lib/mock/f41-build-side-1-2967728-35811/root/chroot_tmpdir/scmroot/pypy3.9
Cloning into '/var/lib/mock/f41-build-side-1-2967728-35811/root/chroot_tmpdir/scmroot/pypy3.9'...
$ git fetch origin c52271071f72b799579556fc10bcb4382c0fd018:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pypy3.9
 * [new ref]         c52271071f72b799579556fc10bcb4382c0fd018 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c522710 Update to 7.3.16