$ git clone -n https://src.fedoraproject.org/rpms/R-rgeos.git /var/lib/mock/f38-build-725159-99560/root/chroot_tmpdir/scmroot/R-rgeos
Cloning into '/var/lib/mock/f38-build-725159-99560/root/chroot_tmpdir/scmroot/R-rgeos'...
$ git fetch origin 28750712a20d129852c699d6572453c671a6199b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rgeos
 * [new ref]         28750712a20d129852c699d6572453c671a6199b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2875071 R-maint-sig mass rebuild