$ git clone -n https://src.fedoraproject.org/rpms/qpwgraph.git /var/lib/mock/f40-build-1465775-23665/root/chroot_tmpdir/scmroot/qpwgraph
Cloning into '/var/lib/mock/f40-build-1465775-23665/root/chroot_tmpdir/scmroot/qpwgraph'...
$ git fetch origin f8343fed766efadc2694d85ec649479d2ab0b30e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpwgraph
 * [new ref]         f8343fed766efadc2694d85ec649479d2ab0b30e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8343fe Update to 0.7.4