$ git clone -n https://src.fedoraproject.org/rpms/cppmyth.git /var/lib/mock/f40-build-2196093-51550/root/chroot_tmpdir/scmroot/cppmyth
Cloning into '/var/lib/mock/f40-build-2196093-51550/root/chroot_tmpdir/scmroot/cppmyth'...
$ git fetch origin cc75ed1b77f577e7c64972b4c97265885ed7c0b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cppmyth
 * [new ref]         cc75ed1b77f577e7c64972b4c97265885ed7c0b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc75ed1 Update to 2.15.1