$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-jupyterkernel.git /var/lib/mock/f40-build-2719895-73027/root/chroot_tmpdir/scmroot/gap-pkg-jupyterkernel
Cloning into '/var/lib/mock/f40-build-2719895-73027/root/chroot_tmpdir/scmroot/gap-pkg-jupyterkernel'...
$ git fetch origin b72ee370f157c9b510734cf2dae2cd3c26915b9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-jupyterkernel
 * [new ref]         b72ee370f157c9b510734cf2dae2cd3c26915b9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b72ee37 Rebuild for gap 4.13.0