$ git clone -n https://src.fedoraproject.org/rpms/R-rle.git /var/lib/mock/f38-build-721726-98613/root/chroot_tmpdir/scmroot/R-rle
Cloning into '/var/lib/mock/f38-build-721726-98613/root/chroot_tmpdir/scmroot/R-rle'...
$ git fetch origin 99498480b83401c87ecd770db2d10876f9101b48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rle
 * [new ref]         99498480b83401c87ecd770db2d10876f9101b48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9949848 R-maint-sig mass rebuild