$ git clone -n https://src.fedoraproject.org/rpms/R-restfulr.git /var/lib/mock/f45-build-6344-348/root/chroot_tmpdir/scmroot/R-restfulr
Cloning into '/var/lib/mock/f45-build-6344-348/root/chroot_tmpdir/scmroot/R-restfulr'...
$ git fetch origin f6f68a6c2fcb86ba89b9fb8d605aa7e00dc65c5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-restfulr
 * [new ref]         f6f68a6c2fcb86ba89b9fb8d605aa7e00dc65c5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6f68a6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild