$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f40-build-2511618-61712/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f40-build-2511618-61712/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin 10ae5d313b08db753d3a82594f4c431823bd115e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         10ae5d313b08db753d3a82594f4c431823bd115e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10ae5d3 6.0.1