$ git clone -n https://src.fedoraproject.org/rpms/kf5-kguiaddons.git /var/lib/mock/f45-build-14816-464/root/chroot_tmpdir/scmroot/kf5-kguiaddons
Cloning into '/var/lib/mock/f45-build-14816-464/root/chroot_tmpdir/scmroot/kf5-kguiaddons'...
$ git fetch origin a042ce9b191d3a2d2ba747aa6eaef92817e3520e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kguiaddons
 * [new ref]         a042ce9b191d3a2d2ba747aa6eaef92817e3520e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a042ce9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild