$ git clone -n https://src.fedoraproject.org/rpms/hwdata.git /var/lib/mock/f42-build-side-1-3534742-46551/root/chroot_tmpdir/scmroot/hwdata
Cloning into '/var/lib/mock/f42-build-side-1-3534742-46551/root/chroot_tmpdir/scmroot/hwdata'...
$ git fetch origin 6c54584e58eee2dabb9a7d1b434a0f0cc5c967d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hwdata
 * [new ref]         6c54584e58eee2dabb9a7d1b434a0f0cc5c967d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c54584 New upstream version 0.396