From: Maarten van der Schrieck <maarten@thingsconnected.nl>

Since commit 62db5247790f2612c0b407a15d1901d88789d35a "rebase -i: generate
the script via rebase--helper" (Jul 14 2017), the short hash is given in
rebase-todo. Specifying rebase.instructionFormat does not alter this
behavior, contrary to what the documentation implies.

Signed-off-by: Maarten van der Schrieck <maarten@thingsconnected.nl>

Submitted-As: https://lore.kernel.org/git/pull.1629.git.git.1704305663254.gitgitgadget@gmail.com