eclipse - How to get only changes from branch's branch in git? -

                   change 1, change 2, change 3, change 4                   / master >> branch                   \ branch a1                              \                               change 1001 

i have made branch master @ beginning. have made branch out of branch (a1).

over time have make several changes branch a. have done changes branch a1.

now branch a1's change master (change 1001), without changes branch (changes 1-4).

can done git? , if it's possible, appropriate steps achieve this?

i'm using egit plugin in eclipse.

you have

x--x--x (master)        \         y--y1--change 1, change 2, change 3, change 4 (brancha)             \              change 1001 (brancha1) 

or:

         change 1001 (brancha1)        / x--x--x (master)        \         y--y--change 1, change 2, change 3, change 4 (brancha) 

in second case (brancha1 comes master), merge brancha1 on master.

but in first case (brancha1 comes brancha), can:

git cherry-pick change 1001 

but leave duplicate commits , subject functional dependencies.
try avoid cherry-picking, if possible.

or:

git rebase --onto master y1 brancha1 

that move commits brancha1 (after y1 of brancha) onto master branch. no duplicate commits