$ git clone -n https://src.fedoraproject.org/rpms/dtkgui.git /var/lib/mock/f41-build-847294-163873/root/chroot_tmpdir/scmroot/dtkgui
Cloning into '/var/lib/mock/f41-build-847294-163873/root/chroot_tmpdir/scmroot/dtkgui'...
$ git fetch origin 318c032d071a1c29bce314d385fee0bf8caaf754:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkgui
 * [new ref]         318c032d071a1c29bce314d385fee0bf8caaf754 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 318c032 Rebuild (qt5)