$ git clone -n https://src.fedoraproject.org/rpms/libarrow.git /var/lib/mock/f40-build-781238-131566/root/chroot_tmpdir/scmroot/libarrow
Cloning into '/var/lib/mock/f40-build-781238-131566/root/chroot_tmpdir/scmroot/libarrow'...
$ git fetch origin c16cc7fccbdc4be247360e7dd6a942afa1387b63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libarrow
 * [new ref]         c16cc7fccbdc4be247360e7dd6a942afa1387b63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c16cc7f Rebuilt for abseil-cpp-20240116.0