$ git clone -n https://src.fedoraproject.org/rpms/rust-quinn.git /var/lib/mock/f40-build-2712734-72059/root/chroot_tmpdir/scmroot/rust-quinn
Cloning into '/var/lib/mock/f40-build-2712734-72059/root/chroot_tmpdir/scmroot/rust-quinn'...
$ git fetch origin 4df425b1cbc33990a6dd1b70bcf8470b9fe93d4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quinn
 * [new ref]         4df425b1cbc33990a6dd1b70bcf8470b9fe93d4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4df425b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild