Fix typos in the CHANGELOG

CHANGELOG.md

@@ -88,13 +88,13 @@ support for HTTPS connections insead of OpenSSL.
 
 ### API removals
 
-* `git_remote_save()` and `git_remote_clear_refspecs()` has been
+* `git_remote_save()` and `git_remote_clear_refspecs()` have been
   removed. Remote's configuration is changed via the configuration
   directly or through a convenience function which performs changes to
   the configuration directly.
 
 * `git_remote_set_callbacks()`, `git_remote_get_callbacks()` and
-  `git_remote_set_transport()` have been removed a the remote no
+  `git_remote_set_transport()` have been removed and the remote no
   longer stores this configuration.
 
 ### Breaking API changes
@@ -168,7 +168,7 @@ support for HTTPS connections insead of OpenSSL.
 * `git_remote_connect()` and `git_remote_prune()` now take a pointer
   to the callbacks.
 
-* `git_remote_fetch()` and `git_remote_download()` now take a poitner
+* `git_remote_fetch()` and `git_remote_download()` now take a pointer
   to fetch options which determine the runtime configuration.
 
 * The `git_remote_autotag_option_t` values have been changed. It has