$ git clone -n https://src.fedoraproject.org/rpms/rkdeveloptool.git /var/lib/mock/f45-build-34558-688/root/chroot_tmpdir/scmroot/rkdeveloptool
Cloning into '/var/lib/mock/f45-build-34558-688/root/chroot_tmpdir/scmroot/rkdeveloptool'...
$ git fetch origin 708f4903c3cad429baedc9ab0d625448a6e37e76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rkdeveloptool
 * [new ref]         708f4903c3cad429baedc9ab0d625448a6e37e76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 708f490 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild