0000000000000000000000000000000000000000 d601750bfcf87359c61110915906f87c720ead7b committer <committer@example.com> 946771200 +0000	commit (initial): original without symlink
d601750bfcf87359c61110915906f87c720ead7b d601750bfcf87359c61110915906f87c720ead7b committer <committer@example.com> 946771200 +0000	checkout: moving from main to A
d601750bfcf87359c61110915906f87c720ead7b dee465281ff47aa01465d6a71f094975f79433d7 committer <committer@example.com> 946771200 +0000	commit: new link to point to 'a'
dee465281ff47aa01465d6a71f094975f79433d7 d601750bfcf87359c61110915906f87c720ead7b committer <committer@example.com> 946771200 +0000	checkout: moving from A to B
d601750bfcf87359c61110915906f87c720ead7b 96790124d8523a74bdce179602c7f6eba7a0f736 committer <committer@example.com> 946771200 +0000	commit: new link to point to 'b'
