$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_truncate.git /var/lib/mock/f40-build-781166-131438/root/chroot_tmpdir/scmroot/rust-uu_truncate
Cloning into '/var/lib/mock/f40-build-781166-131438/root/chroot_tmpdir/scmroot/rust-uu_truncate'...
$ git fetch origin 0549e9d8c0146ec2ce43f1bc1b700a50e58c4fa3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_truncate
 * [new ref]         0549e9d8c0146ec2ce43f1bc1b700a50e58c4fa3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0549e9d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild