commit - 482b0b83833675d8c750a996c3a9db1fb99e1e8d
commit + a290e4b40845ee5d251cdf5e4d9b31693f37ea49
blob - d52a563d452f3ee2fe440e9ab63d1a2b3ddb551f
blob + 086e9968300ec8161ed6529d40471881657f0b98
--- got/got.1
+++ got/got.1
@@ -571,19 +571,15 @@ branch will be used.
 .Pp
 The expected
 .Ar commit
-argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
+argument is a commit ID SHA1 hash, or a reference name or a keyword
+which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used, with both resolving to the
-repository's HEAD reference, or, if the
+resolve to the repository's HEAD reference, or, if the
 .Fl b
 option is used, the head of the checked-out
 .Ar branch .
@@ -740,19 +736,15 @@ branch will be used.
 .Pp
 The expected
 .Ar commit
-argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
+argument is a commit ID SHA1 hash, or a reference name or a keyword
+which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 Keywords and reference names may be appended with
 .Qq :+
 or
@@ -939,19 +931,15 @@ if invoked in a work tree, or to the repository's HEAD
 .Pp
 The expected
 .Ar commit
-argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
+argument is a commit ID SHA1 hash, or a reference name or a keyword
+which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 The former is only valid if invoked in a work tree, while the latter will
 resolve to the tip of the work tree's current branch if invoked in a
 work tree, otherwise it will resolve to the repository's HEAD reference.
@@ -1110,19 +1098,15 @@ arguments are provided, only show differences for the 
 .Pp
 The expected
 .Ar commit
-argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
+argument is a commit ID SHA1 hash, or a reference name or a keyword
+which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 The former is only valid if invoked in a work tree, while the latter will
 resolve to the tip of the work tree's current branch if invoked in a
 work tree, otherwise it will resolve to the repository's HEAD reference.
@@ -1408,17 +1392,15 @@ are as follows:
 .It Fl c Ar commit
 Make a newly created branch reference point at the specified
 .Ar commit .
-The expected argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
-.Pp
-The special
-.Ar commit
-keywords
+The expected argument is a commit ID SHA1 hash, or a reference name or keyword
+which will be resolved to a commit ID.
+An abbreviated hash argument will be expanded to a full SHA1 hash
+automatically, provided the abbreviation is unique.
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 The former is only valid if invoked in a work tree, while the latter will
 resolve to the tip of the work tree's current branch if invoked in a
 work tree, otherwise it will resolve to the repository's HEAD reference.
@@ -1806,19 +1788,15 @@ than producing merge conflicts in the patched target f
 .Pp
 The expected
 .Ar commit
-argument is a commit ID SHA1 hash or an existing reference
-or tag name which will be resolved to a commit ID.
+argument is a commit ID SHA1 hash, or a reference name or a keyword
+which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 Keywords and references may be appended with
 .Qq :+
 or
@@ -2293,18 +2271,16 @@ into the work tree.
 The specified
 .Ar commit
 should be on a different branch than the work tree's base commit.
-The expected argument is a reference or a commit ID SHA1 hash.
+.Pp
+The expected argument is a commit ID SHA1 hash, or a reference name or
+keyword which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 Keywords and references may be appended with
 .Qq :+
 or
@@ -2438,18 +2414,16 @@ into the work tree.
 The specified
 .Ar commit
 should be on the same branch as the work tree's base commit.
-The expected argument is a reference or a commit ID SHA1 hash.
+.Pp
+The expected argument is a commit ID SHA1 hash, or a reference name
+or keyword which will be resolved to a commit ID.
 An abbreviated hash argument will be expanded to a full SHA1 hash
 automatically, provided the abbreviation is unique.
-.Pp
-The special
-.Ar commit
-keywords
+The keywords
 .Qq :base
 and
 .Qq :head
-can also be used to represent the work tree's base commit
-and branch head, respectively.
+resolve to the work tree's base commit and branch head, respectively.
 Keywords and references may be appended with
 .Qq :+
 or