examples: general: extract function demonstrating revwalking
examples: general: extract function demonstrating revwalking

Corillian/libgit2,Corillian/libgit2,stewid/libgit2,Corillian/libgit2,Corillian/libgit2,Corillian/libgit2,stewid/libgit2,Corillian/libgit2,stewid/libgit2,stewid/libgit2,stewid/libgit2,stewid/libgit2