$ git clone -n https://src.fedoraproject.org/rpms/R-rgdal.git /var/lib/mock/f38-build-side-42-init-devel-894363-28550/root/chroot_tmpdir/scmroot/R-rgdal
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-894363-28550/root/chroot_tmpdir/scmroot/R-rgdal'...
$ git fetch origin ec74291d13d42814cec45efa270cb3a3ebc1a3e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rgdal
 * [new ref]         ec74291d13d42814cec45efa270cb3a3ebc1a3e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec74291 new sources