$ git clone -n https://src.fedoraproject.org/rpms/python-jupyter-kernel-test.git /var/lib/mock/f45-build-31242-651/root/chroot_tmpdir/scmroot/python-jupyter-kernel-test
Cloning into '/var/lib/mock/f45-build-31242-651/root/chroot_tmpdir/scmroot/python-jupyter-kernel-test'...
$ git fetch origin 5b21023ddaa6f8bde2eebd93a2c8fdb6f847f8a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupyter-kernel-test
 * [new ref]         5b21023ddaa6f8bde2eebd93a2c8fdb6f847f8a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b21023 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild