$ git clone -n https://src.fedoraproject.org/rpms/rust-arrow-data.git /var/lib/mock/f45-build-40143-768/root/chroot_tmpdir/scmroot/rust-arrow-data
Cloning into '/var/lib/mock/f45-build-40143-768/root/chroot_tmpdir/scmroot/rust-arrow-data'...
$ git fetch origin bde7448ea4185c61dbc1d2348cb8d96de413fce2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-arrow-data
 * [new ref]         bde7448ea4185c61dbc1d2348cb8d96de413fce2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bde7448 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild