$ git clone -n https://src.fedoraproject.org/rpms/python-Rtree.git /var/lib/mock/f45-build-29230-636/root/chroot_tmpdir/scmroot/python-Rtree
Cloning into '/var/lib/mock/f45-build-29230-636/root/chroot_tmpdir/scmroot/python-Rtree'...
$ git fetch origin e01703a7b112eff27211d9a149d2ef28bbfaa089:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-Rtree
 * [new ref]         e01703a7b112eff27211d9a149d2ef28bbfaa089 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e01703a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild