$ git clone -n https://src.fedoraproject.org/rpms/plasma-discover.git /var/lib/mock/f40-build-2630256-65644/root/chroot_tmpdir/scmroot/plasma-discover
Cloning into '/var/lib/mock/f40-build-2630256-65644/root/chroot_tmpdir/scmroot/plasma-discover'...
$ git fetch origin 048c04b7dc48077960c420ccb8887928c1ba3133:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-discover
 * [new ref]         048c04b7dc48077960c420ccb8887928c1ba3133 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 048c04b Backport patches to fix rpm-ostree container support