$ git clone -n https://src.fedoraproject.org/rpms/cppcheck.git /var/lib/mock/f42-build-863045-171350/root/chroot_tmpdir/scmroot/cppcheck
Cloning into '/var/lib/mock/f42-build-863045-171350/root/chroot_tmpdir/scmroot/cppcheck'...
$ git fetch origin 055597aa6d9697191e80c1057d60fd4d658c6139:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cppcheck
 * [new ref]         055597aa6d9697191e80c1057d60fd4d658c6139 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 055597a rebuild for tinyxml2