$ git clone -n https://src.fedoraproject.org/rpms/python-ipykernel.git /var/lib/mock/f39-build-1928943-43073/root/chroot_tmpdir/scmroot/python-ipykernel
Cloning into '/var/lib/mock/f39-build-1928943-43073/root/chroot_tmpdir/scmroot/python-ipykernel'...
$ git fetch origin e59f472ccc9af9c478006da4d2ec28999369ca8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ipykernel
 * [new ref]         e59f472ccc9af9c478006da4d2ec28999369ca8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e59f472 Update to 6.25.1 (rhbz#2144566)