Export only edited and dependent commits

[alapin92]

For example, if there is
commit1
commit2
commit3
commit4

and we edit commit3, there is no need to re-export commit1 and commit 2. The commit3 and commit4 should be exported.

So that the first commit is not rebuilt, in case there is continuous-integration building.

[pingpongboss]

Yes! I've been thinking about this for a long time.