$ git clone -n https://src.fedoraproject.org/rpms/vmaf.git /var/lib/mock/f40-build-794085-139330/root/chroot_tmpdir/scmroot/vmaf
Cloning into '/var/lib/mock/f40-build-794085-139330/root/chroot_tmpdir/scmroot/vmaf'...
$ git fetch origin dc06d6dc6bb673cf8a185b8f787eaa24876b4c40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vmaf
 * [new ref]         dc06d6dc6bb673cf8a185b8f787eaa24876b4c40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc06d6d Suppress modern C build failure