$ git clone -n https://src.fedoraproject.org/rpms/plasma-breeze.git /var/lib/mock/f42-build-side-1-3554982-46650/root/chroot_tmpdir/scmroot/plasma-breeze
Cloning into '/var/lib/mock/f42-build-side-1-3554982-46650/root/chroot_tmpdir/scmroot/plasma-breeze'...
$ git fetch origin 9058b61c86e3c5a8b724d5005fbd5f9edb0dde8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-breeze
 * [new ref]         9058b61c86e3c5a8b724d5005fbd5f9edb0dde8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9058b61 6.4.0