$ git clone -n https://src.fedoraproject.org/rpms/plasma-sdk.git /var/lib/mock/f42-build-side-1-3566285-46733/root/chroot_tmpdir/scmroot/plasma-sdk
Cloning into '/var/lib/mock/f42-build-side-1-3566285-46733/root/chroot_tmpdir/scmroot/plasma-sdk'...
$ git fetch origin ff3f18ad9f0c48663fe871d0a1ba19f1a9f762b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-sdk
 * [new ref]         ff3f18ad9f0c48663fe871d0a1ba19f1a9f762b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff3f18a 6.4.0