$ git clone -n https://src.fedoraproject.org/rpms/nextpnr.git /var/lib/mock/f42-build-side-1-3504949-45986/root/chroot_tmpdir/scmroot/nextpnr
Cloning into '/var/lib/mock/f42-build-side-1-3504949-45986/root/chroot_tmpdir/scmroot/nextpnr'...
$ git fetch origin 6e296026881928db4d268af1de8b28b5b1bf1ec6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nextpnr
 * [new ref]         6e296026881928db4d268af1de8b28b5b1bf1ec6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e29602 update to newer snapshot