$ git clone -n https://src.fedoraproject.org/rpms/appstream-generator.git /var/lib/mock/f40-build-791967-137935/root/chroot_tmpdir/scmroot/appstream-generator
Cloning into '/var/lib/mock/f40-build-791967-137935/root/chroot_tmpdir/scmroot/appstream-generator'...
$ git fetch origin 30ab4afb442b8585eaf9cfbf27f2630bac1e0aa9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/appstream-generator
 * [new ref]         30ab4afb442b8585eaf9cfbf27f2630bac1e0aa9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30ab4af Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild