$ git clone -n https://src.fedoraproject.org/rpms/R-hunspell.git /var/lib/mock/f42-build-side-1-3589352-46957/root/chroot_tmpdir/scmroot/R-hunspell
Cloning into '/var/lib/mock/f42-build-side-1-3589352-46957/root/chroot_tmpdir/scmroot/R-hunspell'...
$ git fetch origin 7d5c416dcfa099694b336f68ad3059d5d018bf8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-hunspell
 * [new ref]         7d5c416dcfa099694b336f68ad3059d5d018bf8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d5c416 R-maint-sig mass rebuild