$ git clone -n https://src.fedoraproject.org/rpms/rust-castaway.git /var/lib/mock/f40-build-2656139-66913/root/chroot_tmpdir/scmroot/rust-castaway
Cloning into '/var/lib/mock/f40-build-2656139-66913/root/chroot_tmpdir/scmroot/rust-castaway'...
$ git fetch origin 8ee5ea0720b3c69aee6914a89365e5d02c3e8209:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-castaway
 * [new ref]         8ee5ea0720b3c69aee6914a89365e5d02c3e8209 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ee5ea0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild