one-liners
A collection of useful one liners
Finding an orphaned commit containing a specific string in a specific file
If you know you had introduced a specific string (e.g. magic-string-to-locate) to a specific file (e.g. path/to/search), you can run:
for SHA in $(git reflog --all | awk '{print $1}'); do if git show $SHA -- path/to/search | grep magic-string-to-locate >/dev/null; then echo found in $SHA; fi; done | uniq
which will display any matching git shas.