$ git clone -n https://src.fedoraproject.org/rpms/rust-curve25519-dalek.git /var/lib/mock/f40-build-2091943-50254/root/chroot_tmpdir/scmroot/rust-curve25519-dalek
Cloning into '/var/lib/mock/f40-build-2091943-50254/root/chroot_tmpdir/scmroot/rust-curve25519-dalek'...
$ git fetch origin 3caefe6fdb72c768772e801e4fe59fb977301613:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-curve25519-dalek
 * [new ref]         3caefe6fdb72c768772e801e4fe59fb977301613 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3caefe6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild