$ git clone -n https://src.fedoraproject.org/rpms/qpwgraph.git /var/lib/mock/f41-build-side-1-3133246-39685/root/chroot_tmpdir/scmroot/qpwgraph
Cloning into '/var/lib/mock/f41-build-side-1-3133246-39685/root/chroot_tmpdir/scmroot/qpwgraph'...
$ git fetch origin 3a871148227f9986aa6ca2c9ec581c83fb5c74a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpwgraph
 * [new ref]         3a871148227f9986aa6ca2c9ec581c83fb5c74a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a87114 Update to 0.8.0