$ git clone -n https://src.fedoraproject.org/rpms/rust-zstd.git /var/lib/mock/f40-build-2497824-61664/root/chroot_tmpdir/scmroot/rust-zstd
Cloning into '/var/lib/mock/f40-build-2497824-61664/root/chroot_tmpdir/scmroot/rust-zstd'...
$ git fetch origin 4a672ff563966268f2c43e0e1c8f23e76c121111:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zstd
 * [new ref]         4a672ff563966268f2c43e0e1c8f23e76c121111 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a672ff Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild