GIT - How to know the branch a branch branched from? -

GIT - How to know the branch a branch branched from? -

support create multiple branches (aaa, bbb, ccc) commit. then, create new branch (ddd) 1 of branch (bbb) , create commit on it.

then pushed remote. how person knows new branch (ddd) comes branch?

the git commands did was:

git branch aaa git branch bbb git branch ccc git branch ddd bbb git checkout ddd echo 2 >> file git add together file git commit -m "2"

and git log show

* commit d259a3b (head, ddd) | | 2 | * commit efb038c (develop, ccc, bbb, aaa) | | 1 | * commit dd24bb6 (master)

it possible know ddd branched bbb?

thanks

it indeed impossible in general. git records only1 single commit-id (sha-1) reference name (such branch or tag) points. history of commit determined solely commit's parent ids, not record branch-names. when force remote, "push" operation sends sha-1 of commit you're pushing (plus more sha-1s other linked objects—trees , files, parent commits, etc—plus contents of objects, needed based on what's missing on remote), , asks remote set its branch point new sha-1.

in other words, tell remote: "here, have commit 1234567, , set branch label ddd = 1234567". may tell "to need 5 other commits", 1 of have labeled bbb, if don't tell remote "oh way set label bbb other commit too" won't have info anywhere.

1this bit of overstatement: git records, in reflog, each sha-1 stored in label, including branch labels. hence possible walk through label's history "figure out started". there 2 limits on though: reflogs purely local, never transmitted fetch or push; , reflogs expire, after 90 days in these cases (although configurable , there additional complexities). long there's force step, or allow more 3 months pass, there's no way tell.

git git-branch