$ git clone -n https://src.fedoraproject.org/rpms/plasma-thunderbolt.git /var/lib/mock/f41-build-851535-165992/root/chroot_tmpdir/scmroot/plasma-thunderbolt
Cloning into '/var/lib/mock/f41-build-851535-165992/root/chroot_tmpdir/scmroot/plasma-thunderbolt'...
$ git fetch origin 435231f38339e6b23673b5a20b949557fd8c3850:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-thunderbolt
 * [new ref]         435231f38339e6b23673b5a20b949557fd8c3850 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 435231f 6.1.90