$ git clone -n https://src.fedoraproject.org/rpms/rust-aes-siv.git /var/lib/mock/f40-build-2639541-66368/root/chroot_tmpdir/scmroot/rust-aes-siv
Cloning into '/var/lib/mock/f40-build-2639541-66368/root/chroot_tmpdir/scmroot/rust-aes-siv'...
$ git fetch origin 2e208fb1e48f250a508502b4ae4baec5de488e0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-aes-siv
 * [new ref]         2e208fb1e48f250a508502b4ae4baec5de488e0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e208fb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild