$ git clone -n https://src.fedoraproject.org/rpms/R-ica.git /var/lib/mock/f38-build-side-42-init-devel-941727-28760/root/chroot_tmpdir/scmroot/R-ica
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-941727-28760/root/chroot_tmpdir/scmroot/R-ica'...
$ git fetch origin fef4c2be7dd60e9a04321b6f5efc5c082e6d9343:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-ica
 * [new ref]         fef4c2be7dd60e9a04321b6f5efc5c082e6d9343 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fef4c2b R-maint-sig mass rebuild