$ git clone -n https://src.fedoraproject.org/rpms/rust-below.git /var/lib/mock/f40-build-782768-132275/root/chroot_tmpdir/scmroot/rust-below
Cloning into '/var/lib/mock/f40-build-782768-132275/root/chroot_tmpdir/scmroot/rust-below'...
$ git fetch origin 5513f23fb8a8f8d5d3c2ee1ba8b308b5e76ed983:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-below
 * [new ref]         5513f23fb8a8f8d5d3c2ee1ba8b308b5e76ed983 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5513f23 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild