$ git clone -n https://src.fedoraproject.org/rpms/python-nine.git /var/lib/mock/f45-build-31716-655/root/chroot_tmpdir/scmroot/python-nine
Cloning into '/var/lib/mock/f45-build-31716-655/root/chroot_tmpdir/scmroot/python-nine'...
$ git fetch origin c6cdda910418094ffdf7f8fc0be6424c8c917e8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nine
 * [new ref]         c6cdda910418094ffdf7f8fc0be6424c8c917e8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6cdda9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild