$ git clone -n https://src.fedoraproject.org/rpms/python-railroad-diagrams.git /var/lib/mock/f45-build-32684-661/root/chroot_tmpdir/scmroot/python-railroad-diagrams
Cloning into '/var/lib/mock/f45-build-32684-661/root/chroot_tmpdir/scmroot/python-railroad-diagrams'...
$ git fetch origin e9d0c2c033be34435d071b3645a237dfdc3bbd89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-railroad-diagrams
 * [new ref]         e9d0c2c033be34435d071b3645a237dfdc3bbd89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9d0c2c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild