$ git clone -n https://src.fedoraproject.org/rpms/robotfindskitten.git /var/lib/mock/f45-build-34579-688/root/chroot_tmpdir/scmroot/robotfindskitten
Cloning into '/var/lib/mock/f45-build-34579-688/root/chroot_tmpdir/scmroot/robotfindskitten'...
$ git fetch origin e5019f109d8535baf7a9b59926226a165eb0f72a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/robotfindskitten
 * [new ref]         e5019f109d8535baf7a9b59926226a165eb0f72a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5019f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild