$ git clone -n https://src.fedoraproject.org/rpms/rust-failure_derive.git /var/lib/mock/f40-build-2712507-72016/root/chroot_tmpdir/scmroot/rust-failure_derive
Cloning into '/var/lib/mock/f40-build-2712507-72016/root/chroot_tmpdir/scmroot/rust-failure_derive'...
$ git fetch origin e90ceb77369fef0f4e1e13ce1a9aede3d034d967:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-failure_derive
 * [new ref]         e90ceb77369fef0f4e1e13ce1a9aede3d034d967 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e90ceb7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild