$ git clone -n https://src.fedoraproject.org/rpms/libbpf.git /var/lib/mock/f41-build-811224-147267/root/chroot_tmpdir/scmroot/libbpf
Cloning into '/var/lib/mock/f41-build-811224-147267/root/chroot_tmpdir/scmroot/libbpf'...
$ git fetch origin 9ce35a5f869d802c0f51eff947b7d142c7422a01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libbpf
 * [new ref]         9ce35a5f869d802c0f51eff947b7d142c7422a01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ce35a5 release 1.4.1-1