$ git clone -n https://src.fedoraproject.org/rpms/python-jupyter-core.git /var/lib/mock/f45-build-31216-651/root/chroot_tmpdir/scmroot/python-jupyter-core
Cloning into '/var/lib/mock/f45-build-31216-651/root/chroot_tmpdir/scmroot/python-jupyter-core'...
$ git fetch origin d6ae7cfc5e6a0b5d0ccd6e617df5f037167e6ccb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupyter-core
 * [new ref]         d6ae7cfc5e6a0b5d0ccd6e617df5f037167e6ccb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6ae7cf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild