$ git clone -n https://src.fedoraproject.org/rpms/rust-typed-arena1.git /var/lib/mock/f40-build-2683760-67975/root/chroot_tmpdir/scmroot/rust-typed-arena1
Cloning into '/var/lib/mock/f40-build-2683760-67975/root/chroot_tmpdir/scmroot/rust-typed-arena1'...
$ git fetch origin c3d12a702a0f62bb18af3f1f7fab5648abd4bab3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typed-arena1
 * [new ref]         c3d12a702a0f62bb18af3f1f7fab5648abd4bab3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3d12a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild