$ git clone -n https://src.fedoraproject.org/rpms/python-catkin-sphinx.git /var/lib/mock/f45-build-29861-641/root/chroot_tmpdir/scmroot/python-catkin-sphinx
Cloning into '/var/lib/mock/f45-build-29861-641/root/chroot_tmpdir/scmroot/python-catkin-sphinx'...
$ git fetch origin e8cacd88c001451438a6cd948e5fbdd4c06ddc6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-catkin-sphinx
 * [new ref]         e8cacd88c001451438a6cd948e5fbdd4c06ddc6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8cacd8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild