$ git clone -n https://src.fedoraproject.org/rpms/tomcat-native.git /var/lib/mock/f41-build-side-1-3136303-39772/root/chroot_tmpdir/scmroot/tomcat-native
Cloning into '/var/lib/mock/f41-build-side-1-3136303-39772/root/chroot_tmpdir/scmroot/tomcat-native'...
$ git fetch origin 0b6313d1a2b10b9d6c3c8fea5c817516bba750fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tomcat-native
 * [new ref]         0b6313d1a2b10b9d6c3c8fea5c817516bba750fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b6313d Change release version to %autorelease