CommandFailedException exception when the specified commit does not exist

2015-01-29 23:28:17,441 ERROR [http-nio-9080-exec-10] jvanderloo *1E3YHMHx1408x855293x1 os7s61 202.68.74.170,172.24.36.105,172.24.12.146,172.24.12.182 "GET /projects/CONF/repos/confluence-previews/commits/asdasd HTTP/1.1" c.a.s.i.w.HandlerExceptionResolverImpl '/usr/bin/git rev-list --format=%H%x02%P%x02%aN%x02%aE%x02%at%n%B%n%x03END%x04 --no-walk=unsorted asdasd asdasd^@' exited with code 128 saying: fatal: ambiguous argument 'asdasd': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
com.atlassian.stash.exception.CommandFailedException: '/usr/bin/git rev-list --format=%H%x02%P%x02%aN%x02%aE%x02%at%n%B%n%x03END%x04 --no-walk=unsorted asdasd asdasd^@' exited with code 128 saying: fatal: ambiguous argument 'asdasd': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
	at com.atlassian.stash.scm.DefaultCommandExitHandler.onError(DefaultCommandExitHandler.java:47) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.scm.git.common.command.GitCommandExitHandler.evaluateThrowable(GitCommandExitHandler.java:104) ~[na:na]
	at com.atlassian.stash.scm.git.common.command.GitCommandExitHandler.onError(GitCommandExitHandler.java:158) ~[na:na]
	at com.atlassian.stash.scm.DefaultCommandExitHandler.onExit(DefaultCommandExitHandler.java:33) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.scm.BaseCommand.callExitHandler(BaseCommand.java:138) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.scm.BaseCommand$CommandFuture.internalGet(BaseCommand.java:251) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.scm.BaseCommand$CommandFuture.get(BaseCommand.java:220) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.scm.BaseCommand.call(BaseCommand.java:75) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.stash.internal.commit.DefaultCommitService.getChangeset(DefaultCommitService.java:212) ~[stash-service-impl-3.6.1.jar:na]
	at com.atlassian.stash.internal.commit.DefaultCommitService.getChangeset(DefaultCommitService.java:204) ~[stash-service-impl-3.6.1.jar:na]
	at com.atlassian.stash.internal.web.repos.RepositoryController.getCommit(RepositoryController.java:405) ~[RepositoryController.class:na]
	at com.atlassian.stash.internal.web.repos.RepositoryController.getCommit(RepositoryController.java:220) ~[RepositoryController.class:na]
	at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25) [applinks-plugin-4.3.5_1418193664000.jar:na]
	at com.atlassian.stash.internal.spring.security.StashAuthenticationFilter.onSuccess(StashAuthenticationFilter.java:224) [StashAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.spring.security.StashAuthenticationFilter.doFilter(StashAuthenticationFilter.java:101) [StashAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doInsideSpringSecurityChain(BeforeLoginPluginAuthenticationFilter.java:111) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doFilter(BeforeLoginPluginAuthenticationFilter.java:77) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:100) [atlassian-trusted-apps-core-3.0.8.jar:na]
	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:79) [atlassian-oauth-service-provider-plugin-1.9.9_1418193664000.jar:na]
	at com.hazelcast.web.WebFilter$RequestWrapper$1.forward(WebFilter.java:542) [hazelcast-wm-3.3.1-atlassian-10.jar:3.3.1-atlassian-10]
	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:100) [atlassian-trusted-apps-core-3.0.8.jar:na]
	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:79) [atlassian-oauth-service-provider-plugin-1.9.9_1418193664000.jar:na]
	at com.atlassian.analytics.client.filter.DefaultAnalyticsFilter.doFilter(DefaultAnalyticsFilter.java:32) [analytics-client-3.53_1418193666000.jar:na]
	at com.atlassian.analytics.client.filter.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:32) [analytics-client-3.53_1418193666000.jar:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doBeforeBeforeLoginFilters(BeforeLoginPluginAuthenticationFilter.java:89) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.web.auth.BeforeLoginPluginAuthenticationFilter.doFilter(BeforeLoginPluginAuthenticationFilter.java:75) [BeforeLoginPluginAuthenticationFilter.class:na]
	at com.atlassian.stash.internal.request.DefaultRequestManager.doAsRequest(DefaultRequestManager.java:82) [stash-service-impl-3.6.1.jar:na]
	at com.hazelcast.web.WebFilter.doFilter(WebFilter.java:463) [hazelcast-wm-3.3.1-atlassian-10.jar:3.3.1-atlassian-10]
	at com.atlassian.stash.internal.hazelcast.ConfigurableWebFilter.doFilter(ConfigurableWebFilter.java:36) [ConfigurableWebFilter.class:na]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_25]
	at java.lang.Thread.run(Thread.java:745) [na:1.8.0_25]
	... 263 frames trimmed
Caused by: com.atlassian.utils.process.ProcessException: Non-zero exit code: 128
	at com.atlassian.stash.scm.SummarizingProcessHandler.complete(SummarizingProcessHandler.java:53) ~[stash-spi-3.6.1.jar:na]
	at com.atlassian.utils.process.ExternalProcessImpl.wrapUpProcess(ExternalProcessImpl.java:659) ~[atlassian-processutils-1.6.0-m2.jar:na]
	at com.atlassian.utils.process.ExternalProcessImpl.finish(ExternalProcessImpl.java:161) ~[atlassian-processutils-1.6.0-m2.jar:na]
	at com.atlassian.stash.scm.BaseCommand$CommandFuture.get(BaseCommand.java:218) ~[stash-spi-3.6.1.jar:na]
	... 25 common frames omitted