$ git clone -n https://src.fedoraproject.org/rpms/rust-h3-quinn.git /var/lib/mock/f40-build-2477840-61604/root/chroot_tmpdir/scmroot/rust-h3-quinn
Cloning into '/var/lib/mock/f40-build-2477840-61604/root/chroot_tmpdir/scmroot/rust-h3-quinn'...
$ git fetch origin 9b234a53acd61adae38483fb26ac42bb15b6d9cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-h3-quinn
 * [new ref]         9b234a53acd61adae38483fb26ac42bb15b6d9cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b234a5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild