$ git clone -n https://src.fedoraproject.org/rpms/dtkwidget.git /var/lib/mock/f41-build-847248-163867/root/chroot_tmpdir/scmroot/dtkwidget
Cloning into '/var/lib/mock/f41-build-847248-163867/root/chroot_tmpdir/scmroot/dtkwidget'...
$ git fetch origin b58eb32197f72417879743ea896850a2c2a6bce5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkwidget
 * [new ref]         b58eb32197f72417879743ea896850a2c2a6bce5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b58eb32 Rebuild (qt5)