How to get the SHA of the base commit a branch is started from?

Question

C    E
|   /
B  D
| /
A

How to get the SHA of the commit A if E is the current HEAD?

See `git log --oneline --decorate --all --graph` – Sajib Khan Mar 02 '17 at 17:12 — Sajib Khan, Mar 02 '17 at 17:12
Even `git log --all` does the job – smarber Mar 02 '17 at 17:13 — smarber, Mar 02 '17 at 17:13

score 3 · Answer 1 · answered Oct 17 '20 at 17:17

3

When trying to get SHA of base commit for a current branch this is useful:

git merge-base --fork-point <main branch>

answered Oct 17 '20 at 17:17

Juozas Kontvainis

score 2 · Accepted Answer · answered Mar 02 '17 at 18:12

2

If finding the common ancestor of the branches C and E is what you need, then:

git merge-base <hash of commit C> <hash of commit E>

answered Mar 02 '17 at 18:12

score 1 · Answer 3 · answered Mar 02 '17 at 17:40

1

You can see git log [options] and find the started commit of a specific branch.

$ git log --oneline --decorate --all --graph

answered Mar 02 '17 at 17:40

Sajib Khan

3 Answers3