$ git clone -n https://src.fedoraproject.org/rpms/python-cookiecutter.git /var/lib/mock/f45-build-30170-643/root/chroot_tmpdir/scmroot/python-cookiecutter
Cloning into '/var/lib/mock/f45-build-30170-643/root/chroot_tmpdir/scmroot/python-cookiecutter'...
$ git fetch origin 6fb2ff8bb2072a8c014e53ce79a6d69a9aab6d68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cookiecutter
 * [new ref]         6fb2ff8bb2072a8c014e53ce79a6d69a9aab6d68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fb2ff8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild