$ git clone -n https://src.fedoraproject.org/rpms/rust-idna0.3.git /var/lib/mock/f40-build-2681326-67957/root/chroot_tmpdir/scmroot/rust-idna0.3
Cloning into '/var/lib/mock/f40-build-2681326-67957/root/chroot_tmpdir/scmroot/rust-idna0.3'...
$ git fetch origin a8ddaa955e375af2cd2f18fe2d9b351808256069:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-idna0.3
 * [new ref]         a8ddaa955e375af2cd2f18fe2d9b351808256069 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8ddaa9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild