$ git clone -n https://src.fedoraproject.org/rpms/R-dbplyr.git /var/lib/mock/f38-build-side-42-init-devel-1023330-29662/root/chroot_tmpdir/scmroot/R-dbplyr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1023330-29662/root/chroot_tmpdir/scmroot/R-dbplyr'...
$ git fetch origin 6605a1630e71da03790a95b7d231b6cecebe0649:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-dbplyr
 * [new ref]         6605a1630e71da03790a95b7d231b6cecebe0649 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6605a16 2.3.0