$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_join.git /var/lib/mock/f40-build-779931-130551/root/chroot_tmpdir/scmroot/rust-uu_join
Cloning into '/var/lib/mock/f40-build-779931-130551/root/chroot_tmpdir/scmroot/rust-uu_join'...
$ git fetch origin 36139463cf95300c2e54dc4c1fa6361bcedd18b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_join
 * [new ref]         36139463cf95300c2e54dc4c1fa6361bcedd18b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3613946 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild