$ git clone -n https://src.fedoraproject.org/rpms/plasma-disks.git /var/lib/mock/f42-build-862334-170742/root/chroot_tmpdir/scmroot/plasma-disks
Cloning into '/var/lib/mock/f42-build-862334-170742/root/chroot_tmpdir/scmroot/plasma-disks'...
$ git fetch origin 51684ea5a9e1328311c61ffc6e5d018dc4a1b6bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-disks
 * [new ref]         51684ea5a9e1328311c61ffc6e5d018dc4a1b6bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51684ea 6.2.4