Merge branch 'wc/find-commit-with-pattern-on-detached-head'

"git rev-parse ':/substring'" did not consider the history leading only to HEAD when looking for a commit with the given substring, when the HEAD is detached. This has been fixed. * wc/find-commit-with-pattern-on-detached-head: sha1-name.c: for ":/", find detached HEAD commits