$ git clone -n https://src.fedoraproject.org/rpms/python-pystray.git /var/lib/mock/f45-build-32472-660/root/chroot_tmpdir/scmroot/python-pystray
Cloning into '/var/lib/mock/f45-build-32472-660/root/chroot_tmpdir/scmroot/python-pystray'...
$ git fetch origin 83fb1b5e0171fb32a962cb4f2b1f5160680d1f3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pystray
 * [new ref]         83fb1b5e0171fb32a962cb4f2b1f5160680d1f3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83fb1b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild