$ git clone -n https://src.fedoraproject.org/rpms/qbs.git /var/lib/mock/f41-build-849812-164978/root/chroot_tmpdir/scmroot/qbs
Cloning into '/var/lib/mock/f41-build-849812-164978/root/chroot_tmpdir/scmroot/qbs'...
$ git fetch origin 807b43aeb8820bd8999ac46beca6e482171837bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qbs
 * [new ref]         807b43aeb8820bd8999ac46beca6e482171837bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 807b43a Update to 2.4.1