$ git clone -n https://src.fedoraproject.org/rpms/rust-thread-tree.git /var/lib/mock/f40-build-2683579-67974/root/chroot_tmpdir/scmroot/rust-thread-tree
Cloning into '/var/lib/mock/f40-build-2683579-67974/root/chroot_tmpdir/scmroot/rust-thread-tree'...
$ git fetch origin e81bdd659332f50ffea43f27e0987afdd4220d61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-thread-tree
 * [new ref]         e81bdd659332f50ffea43f27e0987afdd4220d61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e81bdd6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild