$ git clone -n https://src.fedoraproject.org/rpms/plotnetcfg.git /var/lib/mock/f42-build-863103-171404/root/chroot_tmpdir/scmroot/plotnetcfg
Cloning into '/var/lib/mock/f42-build-863103-171404/root/chroot_tmpdir/scmroot/plotnetcfg'...
$ git fetch origin a7efdc92c32f0c7503dfbefae7826a5e4761289e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plotnetcfg
 * [new ref]         a7efdc92c32f0c7503dfbefae7826a5e4761289e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7efdc9 Rebuild for Jansson 2.14