$ git clone -n https://src.fedoraproject.org/rpms/appstream-generator.git /var/lib/mock/f38-build-side-42-init-devel-1088916-30041/root/chroot_tmpdir/scmroot/appstream-generator
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1088916-30041/root/chroot_tmpdir/scmroot/appstream-generator'...
$ git fetch origin 8acf36b1d2fe172666c3d834382aa0f6c3c8b85e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/appstream-generator
 * [new ref]         8acf36b1d2fe172666c3d834382aa0f6c3c8b85e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8acf36b Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild