$ git clone -n https://src.fedoraproject.org/rpms/rust-rustc-hash.git /var/lib/mock/f40-build-2657913-66917/root/chroot_tmpdir/scmroot/rust-rustc-hash
Cloning into '/var/lib/mock/f40-build-2657913-66917/root/chroot_tmpdir/scmroot/rust-rustc-hash'...
$ git fetch origin c88f4e37f8773132adbd2d6e011d3485bd162600:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustc-hash
 * [new ref]         c88f4e37f8773132adbd2d6e011d3485bd162600 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c88f4e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild