SQL Server 2014 :: How To Repeat The Same Row Combination

I am working on a scenario where I would need to repeat the same row for previous MonthIDs, here's the example (snapshot attached):

CustomerIDMonthIDRSCIDFlag1Flag2Flag3
1232943456000
1233001234011
1233033542010
1233032345111
1233043542010
1233042345111
1233053542010
1233052345111
1233062345111
1233063542010
1233072345111
1233073542010
1233083542010
1233093542010

1.For MonthIDs 309 & 307, I would need to add same combinations to 4 prior months (for 309, I would need the 309 row as 308, 307, 306, 305 and for 307, I would need to add 306, 305, 304, 303).

2.From the snapshot, Green rows are added for 309 MonthID and Orange rows are added for 307.

3.While we are adding 309 row to prior to 4 months, if any prior month has different combination than 309, that same combination need to be repeated for prior months.

I was using the below code to achieve the same:

declare @SC_j as int = 0;
declare @SC_k as int = 4;
while @SC_j <= 4
begin
insert into #Test
select distinct dt.CustomerID

[code]....

But my code starts from 1st MonthID however I would want this to be starting from last MonthID which I am not able to achieve.