$ git clone -n https://src.fedoraproject.org/rpms/xxkb.git /var/lib/mock/f38-build-side-42-init-devel-835648-28392/root/chroot_tmpdir/scmroot/xxkb
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-835648-28392/root/chroot_tmpdir/scmroot/xxkb'...
$ git fetch origin 90c92dbbe733e8212e1dacb962da8e90240d009e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xxkb
 * [new ref]         90c92dbbe733e8212e1dacb962da8e90240d009e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90c92db Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild