Getting a list of all children of a given commit

Question

I\'d like to run git filter-branch on all children of a given commit. This doesn\'t seem to be an easy task, since there doesn\'t appear to be a way to tell

Answer 1

Show the ancestry paths to commit A from a set of others:

git log--ancestry-path^Aothers

Show all the unreachable commits in the repo:

git fsck --unreachable --no-reflogs \
| awk '$2 == "commit" {print $3}'

Trace all descendants of commit A anywhere in the repo:

git log --ancestry-path --graph --decorate --oneline ^A \
   --all $(git fsck --unreachable --no-reflogs | awk '$2=="commit" {print $3}')

Show all references whose history includes a commit:

git log --ancestry-path --graph --simplify-by-decoration --oneline --all ^A
# and in case A might have a direct ref, add:
git log --ancestry-path --graph --simplify-by-decoration --oneline A^!

edit: correction: don't show unwanted commits when A itself has parents with other children.