$ git clone -n https://src.fedoraproject.org/rpms/R-dbplyr.git /var/lib/mock/f40-build-1514368-23911/root/chroot_tmpdir/scmroot/R-dbplyr
Cloning into '/var/lib/mock/f40-build-1514368-23911/root/chroot_tmpdir/scmroot/R-dbplyr'...
$ git fetch origin 814be86353497ccd039a2661386c8a899681d743:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-dbplyr
 * [new ref]         814be86353497ccd039a2661386c8a899681d743 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 814be86 Specific versions of suggests not really needed