$ git clone -n https://src.fedoraproject.org/rpms/kinfocenter.git /var/lib/mock/f42-bootstrap-3533811-46421/root/chroot_tmpdir/scmroot/kinfocenter
Cloning into '/var/lib/mock/f42-bootstrap-3533811-46421/root/chroot_tmpdir/scmroot/kinfocenter'...
$ git fetch origin 3c42f6033ade9e850ecf54a4528292e54e4b6d5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kinfocenter
 * [new ref]         3c42f6033ade9e850ecf54a4528292e54e4b6d5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c42f60 6.3.5