bin/ sha1 commits can be smaller than 8 chars

The script only handles commits with "Fixes: <sha1>" where <sha1> is
equal or great than 8 chars. But <sha1> can be smaller, like 7 chars.

This commit relax the restriction to handle <sha1> 4 or more chars.

Fixes: 533fead4 ("bin/ tweak the commit sha matching pattern")

Acked-by: Eric Engestrom <>
Signed-off-by: Juan A. Suarez Romero <>
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merge request