$ git clone -n https://src.fedoraproject.org/rpms/bpftool.git /var/lib/mock/f42-build-864489-172350/root/chroot_tmpdir/scmroot/bpftool
Cloning into '/var/lib/mock/f42-build-864489-172350/root/chroot_tmpdir/scmroot/bpftool'...
$ git fetch origin ff46ddb3ef083feef35e9d9251155473c7a29815:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bpftool
 * [new ref]         ff46ddb3ef083feef35e9d9251155473c7a29815 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff46ddb Exclude i686 arch