$ git clone -n https://src.fedoraproject.org/rpms/python-sphinx-theme-builder.git /var/lib/mock/f39-build-1537880-36388/root/chroot_tmpdir/scmroot/python-sphinx-theme-builder
Cloning into '/var/lib/mock/f39-build-1537880-36388/root/chroot_tmpdir/scmroot/python-sphinx-theme-builder'...
$ git fetch origin b9540aa7e14f58a09cbb5fd0273494030106882f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinx-theme-builder
 * [new ref]         b9540aa7e14f58a09cbb5fd0273494030106882f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9540aa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild