$ git clone -n https://src.fedoraproject.org/rpms/knot.git /var/lib/mock/f41-build-850900-165764/root/chroot_tmpdir/scmroot/knot
Cloning into '/var/lib/mock/f41-build-850900-165764/root/chroot_tmpdir/scmroot/knot'...
$ git fetch origin e032f5a7bb1f2c5c314830d05d0be68f35bb4c0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot
 * [new ref]         e032f5a7bb1f2c5c314830d05d0be68f35bb4c0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e032f5a Release 3.3.9-1